Heres a awesome Boulevard Swiss made watch! it is not the original band. 

it is Shock proof, waterproof, anti-magnetic, and winds up! so never needing battery! 

Band has been replaced & most likely was a leather band

now the water proof seal is from 1946 and may need to be replaced if you plan on wearing in the water, but it is possible it is still waterproof. 

Battery plate has an engraving Dale F Moffett. Who was the owner of Ogdin & Moffett in Port Huron.

if you have any questions feel free to send me a message, thank you !