Elgin jas boss pocket watch

My grandfather was a sailor back in the 1930's during World War II believe this might have been his, the information on it doesn't have a year but there is a warranty inside stating it's a" 10k plated Jas Boss case, made of two plated solid gold overlaying a plate of composition metal and is warranted to wear for 15 years Keystone Watch case company" that pinkish paper you see that"s the warranty people it's in very nice condition the numbers are roman numeric and also has a second hand timer on the face of the watch has beautiful engravings om the front it has a arrow pointing up with calm waves and a boat and I see a church or house..and on the back it is an arrow pointing down with stormy weather scene and with the church still standing but trees blowing away..it's pretty amazing engravings.I don't want to sell but I would love to know how old and in what year, and if there is one out there just like it , or did my Grandfather leave me something special.