ANTIQUE GOLD PLATED GENTS OPEN FACED POCKET WATCH // STOPS STARTS NOT WORKING. It measures approximately 54.5mm across the diameter. Shuts as should SEE PIC. STEM AND CROWN ok, plating good, NO DINKS. What you see is what you get, it is offered with no reserve.Pl ease Check out my other items. Be sure to add me to your favourites list. Please check out my many watch parts and watches I have listed this week and lots more to come over the next week or so.