Yes it is a wrist watch...
It is an el cheapo Sekonda battery analogue, stainless steel with a half moon digital display at the bottom of the face. One I found that had been dropped several yards, new looking and apparently none the worse for its fall apart from the minute hand has come adrift and needs to be refitted. Which involves getting its mechanism out of the case.
I have got the case back off, but I cannot work out how to remove the 'winder' to get the works out. There are no screws, and no obvious catches that I could see - does anyone know how to release the winder shaft please?