Can anyone please help in identifying this old TUDOR? watch

[APR999]

Dear Forum members,

Can anyone kindly help in identifying this watch which I picked up at a garage sale.

It's a ladies watch in a 9ct gold case with two hinges and is running well. The case measures about 1" across.

It seems to me to be of a style that dates perhaps to the 1920s. The two-tone green and gold dial is unmarked except for a 'SWISS MADE' marking on the base, but the strap, which looks to be original, is marked TUDOR and GENEVE - SUISSE.

The movement is stamped 15 jewels - 3 adjusts.

Any assistance would be greatly appreciated.

Many thanks indeed.