Inherited old Seamaster

Take it to a watchmaker and ask them to open the back and get some good shots of the movement. I say 'take it to a watchmaker' because the back has little to no scars...try to keep it that way! Find someone with skills that won't add a nasty scratch. Post the movement pictures, and members with far more knowledge than I will likely provide valuable guidance.

From what I see, it looks like a well kept piece that is in good shape! If it hasn't been serviced, again, a good watchmaker will be key...but be clear that you want to keep it as original as possible if/when you have it serviced. It'll cost some money, but it's worth it for a family piece, especially one in this condition. Also, a service is recommended if this has been sitting for years...same mindset as if you found a sweet MG in a barn and knew it hadn't been run for a decade or two...gotta change all fluids and tend to a few things before getting her on the road again!

How cool is it to have a piece your Great Grandfather wore? Just think about even the mundane daily adventures, let alone the ones that created memories and stories he told your Father and you!

And...welcome to an amazing community with more knowledge than any individual can cram in to their brain cage! Looking forward to the movement pictures.

Edit: Added a generation...'Great Grandfather' --- too cool

Mid to Late 1950's Seamaster, nice heirloom, get it serviced if you plan to wear it.