GrandFather to GrandFather

I was given this watch when I was 17 for a graduation gift by my GrandFather. I'm 60 yrs. old now, and a GrandFather. The watch had Beveled glass covers, but one day my Mother took it to a Jewler to be cleaned. When He returned it the Glass was gone and replaced with plastic. My mother was upset but didn't know what to do and she had no proof of the beveled glass. So the covers are gone. I know this is a New England Watch Co. watch but thats all...Any Info would be Greatly Appreciated. Thank You...Great watch site...captphrank