So I have found my grandfathers Helvetia. You can see pictures below. It works, I do not know how to open the back lid. Watch ticks and it is in considerably good shape. It has to be older than 40 years. I culd not find exact match on the internet. If some of you could be so kind to identify the watch for me and estimatr the value if possible, i would be very gratefull! Thanks in advance :).