The Vintage Wrist Watch Company has dated this piece to the 1950s.
The movement is complete with the spare parts compartment, and it is all protected by an inner cover.

The watch measures 51mm diameter excluding the winding stem and the loop. The case is chromium plated and has some surface marking to the back but not too detrimental. The inside of the case back has a list of service references, this watch appears to have been very well maintained which suggests it was used in a situation where accuracy was important. Indeed, this same model of chronograph was used by the Swedish military.

The acrylic lens is in good condition, just minor marking if you look very closely.
The signed dial is in its original finish and it is in beautiful condition. Two subsidiary seconds dials, one for constant seconds and the other to record up to 30 minutes.
The watch comes in a new presentation box.
The Vintage Wrist Watch Company has dated this piece to the 1950s.
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