The Vintage Wrist Watch Company has dated this piece to the 1900s.
The watch has a 63 Lépine hand-winding movement. All early IWC wrist watches either had the calibre 63 Lépine or calibre 64 Savonnette movement. They first appeared in the IWC movement and parts catalogue in around 1891-92.
The movement is ticking away nicely and the time keeping is good to within around two minutes over 24 hours. The movement is protected by an inner cover.

The watch measures 33mm diameter excluding the winding crown and the fixed wire lugs. The case is silver and there are Swiss silver marks inside the hinged case back. The back of the watch has a little unevenness but overall the condition is very good for such an early piece.
The watch glass has a little marking but is very acceptable.
The white enamel dial is in good condition. It has blued steel hands (pin-set) and an outer minute track.
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The Vintage Wrist Watch Company has dated this piece to the 1900s.
Specialists in antique and vintage wrist watches and pocket watches
You can view the stock and full dealer information on the The Vintage Wrist Watch Company Profile Page