The Vintage Wrist Watch Company has dated this piece to the 1960s.
Gents 1960s Oriosa diver’s chronograph.
The watch has a 17-jewel Landeron 248 hand-winding movement which is working nicely.
The watch measures 38mm diameter excluding the winding crown, buttons and lugs. The case is chromium plated while the screw-on case back is stainless steel. There is general light surface marking but nothing too serious.

Bi-directional rotating bezel.
The lens has a couple of small marks visible through a jeweller’s loupe.
The signed dial is in its original finish with original hands and chronograph. There are two subsidiary dials, one for constant seconds and the other to record up to 30 minutes. This recording dial has three large markers at three, six and nine minutes. These were aimed at the businessman who made international telephone calls which were very expensive at the time. The calls were rounded to chargeable chunks of three minutes and so watchmaking companies came up with this scale to help people control their talking duration.
There is light marking to the dial but again, you have to look quite closely to see it.
A later leather strap has been fitted.
The watch comes in a new presentation box.
The Vintage Wrist Watch Company has dated this piece to the 1960s.
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