1175 Buford Highway. Suite 120
Suwanee, Georgia. 30024
www.goldsmithworks.com
770.831.1257 - 1.800.438.6894

Date/Report Number …..022612R5BY.04 Item:  1949 BULOVA PROFESSIONAL 28.5 X 33 WITH ETA 900 BASED BULOVA 10-BA 18 JEWELS HACKED SECONDS
IMG_7535.JPG (2261929 bytes)

Description of item: VINTAGE 1949 BULOVA PROFESSIONAL 28.5 X 33 WITH ETA 900 BASED BULOVA 10-BA 18 JEWELS HACKD SECONDS MANUAL WIND MOVEMENT IN A BULOVA ALL STAINLESS STEEL SINGLE CASE SYSTEM TWO PART DUAL SEAL CROWN PRESSED OUTER-TENSION RING SEALED CRYSTAL WITH KHAKI G-18 NATO STYLE BALLISTIC NYLON MILITARY STRAP .

.Estimated Retail Replacement Value $593.00


Reports are supplied at the request of the customer and it is for the customer's exclusive use. Reports express an opinion of the time of the examination of the jewelry. This report is for customers use only for the following two purposes, indicating estimated retail replacement value to obtain insurance coverage, or for the purpose of providing geological information. goldsmith Works does not guarantee that the appraisal valuation will result in a sale at the price. Estimated retail replacement value is arrived after analyses of what the approximate high retail cash asking price is for labor, materials, and design. These prices may be substantially higher than actual transaction or warranty with regards to any item described in the report, since jewelry grading is not an exact science, this  report represent the best opinion of the company. GoldSmith Works is in no case responsible for differences that occur by repeated grading by other experts in the field and/or use of other standards, norms, methods or criteria other than those used by GoldSmith Works. GoldSmith Works is expressly held harmless by customers including, but with out limitation for any claims or actions that may arise out of negligence in connection with the preparation of this laboratory report, or actions based upon the customer's use of the report. The information on the carat weight, clarity grade, color grade on the report is approximate due to the limitations in jewelry grading. The item was tested, graded, and examined under 10x magnification using the techniques and equipment available to GoldSmith Works, including fully corrected triplet loupe, binocular microscope, master color comparison guides, diamond color comparison tools, electronic carat balance, non-contact optical measuring device, and ancillary instruments necessary at the time of Exam

 

 

 

 

1949
BULOVA
PROFESSIONAL

28.5 X 33

WITH

ETA 900
BASED
BULOVA
10-BA
18 JEWELS
HACKD SECONDS
MANUAL WIND
MOVEMENT

IN

A
BULOVA
ALL STAINLESS STEEL
SINGLE CASE SYSTEM
TWO PART DUAL SEAL CROWN
PRESSED OUTER-TENSION RING
SEALED CRYSTAL


WITH

KHAKI G-18 NATO STYLE
BALLISTIC NYLON
MILITARY STRAP

 

PROVIDENCE

TO PROVIDE A WATERPROOF WATCH FOR SAILORS/BOATING ENTHUSIASTS AND NURSES AND DOCTORS, BULOVA PRODUCED AN UNUSUAL AWESOME WATCH THAT WAS   COMPOSED OF AN ALL STEELONE PIECE CASE WITH  SPLIT STEM SYSTEM AND PRESSED ON STEEL BEZEL SEALED  CRYSTAL.

BULOVA UTILIZED THE CREATIVE GENIOUS OF THE WYLER COMPANY. WYLER DESIGNED AND PRODUCED THE BEST WATCH CASING SYSTEM IN THE WORLD -- IN FACT, BETTER THAN ROLEX - FROM 1938 THROUGH THE PRESENT DAY THIS BULOVA WAS OFFERED.

THE WYLER SYSTEM WAS THE WORLDS FIRST SINGLE CASE CASE SYSTEM WITH MICRO SEALED TWO PIECE STEM AND A FINAL SEAL OF PRESSED CRYSTAL WITH PRESSES STEEL TENSION RETENSION RING.

BULOVA THEN DESIGNED AN 18 JEWEL CENTER SWEEP HEAVY DUTY MOVEMENT BY MODIFYING A 1949/50 ETA 900 EBAUCHE. BULOVA BEEFED UP THE DRIVE TRAIN AND HACKED THE SUB-SECOND MECHANISM TO PRODUCE A SWEEP SECOND HAND MOVEMENT THAT WAS SURE TO PLEASE BULOVA PROFESSIONAL CUSTOMERS.

FROM THE BULOVA CRYSTAL TENSION RING TO THE ONE PIECE  WATER PROOF CASE WITH TWO PIECE STEM AND LONG NECK STEM TUBE WITH TWO PIECE SEALED CROWN, AND CENTER SWEEPS SECOND HAND, THIS BULOVA WAS ADVERTISED TO    SAILING, BOATING, MEDICAL & SCIENCE PROFESSIONALS.

 IMG_7535.JPG (2261929 bytes)

THIS IS A
PROFESSIONAL

TWO PIECE STEM
SINGLE CASE BULOVA

IMG_7551.JPG (179549 bytes)

WITH
OUTER TENSION RING
SEALED CRYSTAL

IMG_7544.JPG (141084 bytes)

ALL STEEL CASE

IMG_7542.JPG (139088 bytes)

MATT WHITE DIAL
WITH
OUTLINED RAISED
LUME NUMBERS

IMG_7544.JPG (141084 bytes)


WITH
BLACK
MILITARY STYLE
ILLUMINATED HANDS
&
RED SWEEP SECOND HAND

 

RE-ILLUMINATED
WITH
AF-LUMINOVA
HIGH-PERFORMANCE
PHOSPHORESCENT PIGMENT

IMG_7546.JPG (136098 bytes)

 

BLACK
SWEEP SECONDS
CHAPTER RING
MARKED WITH NUMERALS
EVERY 5 SECONDS
FROM
5 THRU 60

4A.jpg (60405 bytes)

KHAKI BALLISTIC NYLON

IMG_7543.JPG (138171 bytes)

4 KEEPER
KHAKI MILITARY SPORT
BALISTIC NYLON STRAP

3A.jpg (57965 bytes)

THE BEST STYLE STRAP FOR WIRE LUGS

2A.jpg (58350 bytes)

AN ORIGINAL LOOK

1A.jpg (55252 bytes)

KHAKI BALLISTIC NYLON

IMG_7513.JPG (147685 bytes)

WIRE LUG CASE

IMG_7515.JPG (136313 bytes)

ALL STEEL SINGLE PIECE CASE

IMG_7488.JPG (113249 bytes)

THE DIAL IS FITTED TO MOVEMENT
AND
DROPPED INTO THE STEEL CASE

IMG_7492.JPG (152124 bytes)

BULOVA WATCH CO
SWISS
STAINLESS STEEL
818

IMG_7486.JPG (149888 bytes)

HERE YOU CAN SEE TWO BALANCES

IMG_7497.JPG (156604 bytes)


WE REPLACED THE
BALANCE & HAIRSPRING


IMG_7490.JPG (135802 bytes)

HERE IS THE CROWN
WITH MALE  HALF OF STEM
NOTICE THE DEPTH OF CROWN

IMG_7496.JPG (120360 bytes)

HERE IS THE ORIGINAL
BULOVA CRYSTAL
WITH
DIAL TENSION RING
AND
EXTERNAL CRYSTAL
TENSION RING

 IMG_7518.JPG (126169 bytes)RE-ILLUMINATED
WITH
AF-LUMINOVA
HIGH-PERFORMANCE
PHOSPHORESCENT PIGMENT

IMG_7499.JPG (142832 bytes)

IMG_9669.JPG (122568 bytes)

BEFORE RESTORATION

IMG_7498.JPG (159035 bytes)
AFTER RESTORATION

BULOVA ETA 900 BASE
BULOVA 10-BA

10-BA

Features
manual wind
sweep second

Data
10.5''', Dm= 23.35mm
H= 3.5mm
18 jewels
f = 18000 A/h
power reserve 48h

 

ETA 900

Features
manual wind
sub second

Data
10.5''', Dm= 23.35mm
H= 3.5mm
18 jewels
f = 18000 A/h
power reserve 48h

[NOTE: ACTUAL RESERVE MAY VARY FROM MANUFACTURERS SPECS]

NOTICE THE ADDED
SWEEP SECONDS HACK.
THE LARGE BRASS WHEEL
WAS ADDED TO A
SUB-SECONDS MOVEMENT
CREATING
THE ABILITY TO TIME
WITH THE WATCH
PERFECT FOR
PROFESSIONALS
NURSES
DOCTORS
SPORTS

THE DESIGN

A hollow canon pinion that allowed a wheeled center shaft to protrude through the dial, mounted a second hand to it, and ran the combo with the very sub-seconds wheel they were eliminating...

AASCOKIMG_4195.jpg (67850 bytes)

Instead of the drive train turning the dial protruding shaft/pinion at 6 position connected to the tiny second hand, they mounted a large brass/alloy wheel on the opposite side of the shaft that now protruded through the bridge. That wheel turned a wheel on top of a NEW center "shaft' held in position be a new this jeweled bridge that went through a new HOLLOW center cannon pinion in the center of the movement that then protruded through the center of the dial where a new long ***sweep second hand attached.

***sweep second hand
technically, "sweep" usually means rotating round without TICKS. In other words, smoothly rather than "ticking" by second round. In this write up, we are using sweep in a general way to better explain our history and science. It made no difference whether it was ticks or moves smooth, the idea being that one had a large second hand that went round in tune with the movement and the chapter ring so one could count, time & now even synchronize.

 

*****************************
CONDITION WATCH:
EXCELLENT  -  RUNS EXCELLENT 
*****************************