Kembery Antique Clocks Ltd has dated this piece to the 1940s.
The case back bears an issue number and marked with the DH German military watch. A manual wind mechanism signed Glycine.

Case width 33mm
From Kembery Antique Clocks Ltd you can expect a genuine wristwatch supplied with a presentation box that is in full working order and sold with 12 months guarantee. Free UK tracked, insured and signed for delivery on a day of your choice, International deliveries please contact us for a quote. If you have any questions regarding our watches please call us or email us and we will be happy to help you.
Kembery Antique Clocks Ltd has dated this piece to the 1940s.
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