A while ago a friend gave me a watch in rather poor condition because I am interested in watches. The rather impressive-looking crystal has a crack at the edge but that's not unexpected, but overall it looks quite nice, except for a mechanical problem.
Here is the watch in question: on the dial it says "Tyson" but on the back it says "Plato". I feel it's one of those Swiss "jobbers", and cannot yet identify the movement.
When wound, it runs quite well, but when the crown is pulled out it cannot set the time. This makes me suspect that perhaps the 4th wheel is not working or broken, but I cannot locate a replacement part to render it functional again, nor would I consider it a project watch worth sinking significant investment to revive. I would like to hear from my learned members who can offer some insight and suggestions.
Just for the record: a while ago at a collectors fair, a watch dealer from whom I bought some watches had another one just like this but with a black dial.