The Bulova wrist watch, model 10 AK, 10 1/2 ligne size, 15-
jewel movement, may be identified by a black dial with the manu-
facturer’s name on it. It is a waterproof case, stem wound and stem
set. The case is of the screw-back type, sealed with a rubber washer
and dust cover. The bezel is formed as an integral part of the case
ring and is equipped with an unbreakable crystal. The movement
is secured with a case ring and is not held in the case with screws.
Disassembly:
Remove Wrist Band. Press in on either end of the spring bar
with a small screwdriver and release it from the lug; slide it from
the lug and pull it out of the opposite lug. Remove the other spring
bar in the same manner.
Remove Back, Gasket, and Dust Cover. Unscrew
the back, using a case wrench. Remove the rubber gasket and snap
out the dust cover with a case opener.
Release Unused Power of Mainspring. Grasp crown
between thumb and index finger, release click with a small screw-
driver, L.nd let the crown turn slowly between the fingers to unwind
the unused power of the mainspring.
Remove Stem and Crown. Loosen the setting
lever screw two turns and remove stem and crown from the move-
ment and case.
Remove Movement From Case. Lay the movement
on the bench, tap lightly on the case, and lift case off the movement.
Remove Hands . Protect the dial with paper and
remove the hands, using a hand remover.
Remove Movement Ring. Remove two movement
ring screws, and separate movement and movement ring.
Remove Dial. Loosen two dial foot screws two turns
and lift off dial; then tighten dial foot screws to avoid losing them.
Remove Hour Wheel. Grasp the hour wheel with
tweezers, lift it off cannon pinion, and remove brass dial washer.
Remove Cannon Pinion . Grasp cannon pinion with
pin vise and lift it up and off.
Remove Setting Bridge. Remove two setting bridge
screws and lift off the setting bridge.
Remove Minute and Setting Wheels . Lift minute and setting wheels off of their respective posts.
Remove Winding and Setting Assembly. Hold
clutch lever spring in place and lift off clutch lever and clutch lever
spring. Remove clutch and winding pinion. Invert movement on
the movement block and unscrew the setting lever screw. Lift off
the setting lever.
Remove Balance Cock and Balance Assembly.
Loosen the hairspring stud screw and free stud from balance cock.
Remove the balance cock screw and the balance cock. If balance
cock is tight, insert screwdriver between balance cock and plate and
Remove Pallet Bridge and Pallet Assembly. Remove two pallet bridge screws and lift off pallet bridge. Remove pallet assembly
Remove Ratchet Wheel, Crown Wheel, and Click.
Remove ratchet wheel screw and ratchet wheel. Remove crown
wheel screw by turning it clockwise. Lift off the crown wheel. Re-
move click screw and click. Remove click spring.
Remove Barrel Bridge. Remove the barrel bridge
screws and lift off the barrel bridge. Remove setting lever screw.
Remove Train Bridge . Remove train wheel bridge screws and lift off bridge.
Remove Train Wheels and Mainspring Barrel Assembly. Remove center wheel, third wheel, fourth wheel, escape wheel,
and mainspring barrel assembly.
Remove End Stone Cap Assembly . Invert movement on movement block, remove end stone cap screws, and lift off
end stone cap assembly.
Remove Mainspring. Hold the mainspring barrel
between the thumb and index finger, while the barrel is supported
on the anvil, and place a screwdriver of the proper size within the
slot provided in the cap and pry off the cap. Turn arbor counter-
clockwise until it disengages from mainspring; then lift out arbor.
Grasp inner coil of mainspring with tweezers and slowly uncoil it
out of mainspring barrel.
