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| Date/Report
Number …..022612R5BY.04 Item: 1949
BULOVA PROFESSIONAL 28.5 X 33 WITH ETA 900 BASED BULOVA 10-BA 18 JEWELS HACKED SECONDS |
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| 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 |
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| 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.
-
THIS IS A
PROFESSIONAL
TWO PIECE STEM
SINGLE CASE BULOVA
WITH
OUTER TENSION RING
SEALED CRYSTAL
ALL STEEL CASE
MATT WHITE DIAL
WITH
OUTLINED RAISED
LUME NUMBERS
WITH
BLACK
MILITARY STYLE
ILLUMINATED HANDS
&
RED SWEEP SECOND HAND
RE-ILLUMINATED
WITH
AF-LUMINOVA
HIGH-PERFORMANCE
PHOSPHORESCENT PIGMENT
BLACK
SWEEP SECONDS
CHAPTER RING
MARKED WITH NUMERALS
EVERY 5 SECONDS
FROM
5 THRU 60
KHAKI BALLISTIC NYLON
4 KEEPER
KHAKI MILITARY SPORT
BALISTIC NYLON STRAP
THE BEST STYLE STRAP FOR WIRE LUGS
AN ORIGINAL LOOK
KHAKI BALLISTIC NYLON
WIRE LUG CASE
ALL STEEL SINGLE PIECE CASE
THE DIAL IS FITTED TO MOVEMENT
AND
DROPPED INTO THE STEEL CASE
BULOVA WATCH CO
SWISS
STAINLESS STEEL
818
HERE YOU CAN SEE TWO BALANCES
WE REPLACED THE
BALANCE & HAIRSPRING
HERE IS THE CROWN
WITH MALE HALF OF STEM
NOTICE THE DEPTH OF CROWN
HERE IS THE ORIGINAL
BULOVA CRYSTAL
WITH
DIAL TENSION RING
AND
EXTERNAL CRYSTAL
TENSION RING
RE-ILLUMINATED
WITH
AF-LUMINOVA
HIGH-PERFORMANCE
PHOSPHORESCENT PIGMENT
BEFORE RESTORATION
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...
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.
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CONDITION WATCH:
EXCELLENT - RUNS EXCELLENT
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