Buren ???

Buren ???

Description

This "Grand Prix" movement from Buren is a pretty old form movement, probably from the 1930ies. It's high quality can be seen on the stripes decoration and on the bimetal balance with screws. Bimetal balances were not often used in tiny ladies' movements. They reduce the running errors, which occur due to temperature changes to a minimum.
An interesting detail is the missing color on the "R"etard/"S"low marking of the balance cock. What might be the reason?

Technical data

ManufacturerBuren
Caliber???
Number of jewels17
EscapementAnchor with pallets
BalanceBimetal screw balance
Shock protection(s)none
Balance cock directioncounterclockwise
Hairspring studfixed
Regulator typeLong regulator arm
Movement constructionFork
Escapement wheel, Fourth wheel, Third wheel, Center wheel
Mainspring barrel
FunctionsHour, minute
Beats per hour18000
Size53/4 x 81/2'''
Factsheet

Usage gallery

Buren ladies' watch
Buren ladies' watch