The Vintage Wrist Watch Company has dated this piece to the 1940s.
The movement is protected by an inner cover

The chronograph measures 51mm diameter excluding the winding stem and the loop. The case is marked as being ‘metal extra blanc’ (white metal), probably nickel. The front and sides of the case are in good condition, some unevenness to the hinged case back.

The glass lens is in good condition.
The dial is in its original finish and looks good to the naked eye. If viewed closely, there are a few hairlines. Original pin set hands which would usually date it back to around 1900/1910s but we think this is a later piece, probably 1940s, and they have kept the complication of the pin-set mechanism. The chronograph feature is operated by way of the mono pusher on the crown. The dial is marked “kilometres 1er tour”… this, along with the speeds given, suggest it would have been car or motorbike speed trials, in this instance measuring the kilometres per hour of the first lap. The chronograph re-sets to just to the right of zero.
The chronograph comes with a leather albert, and it all comes in a new presentation box.
The Vintage Wrist Watch Company has dated this piece to the 1940s.
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