Hamilton Electric 500 Keychain CASE DESIGN_Traditional SIZE: 41mm in diameter |

SIZE:  41mm in diameter | 43mm lug to lug

but had that little extra that really made it stand out as a Hamilton Electric

It comes with a very nice inner and outer box

BAND/BRACELET:  Brand New Old Stock Genuine Leather Hamilton Band with Hamilton Marked Gold Filled Buckle

M4 (dating the watch movement to 1964)

Hamilton Electric 500 Keychain CASE DESIGN_Traditional SIZE: 41mm in diameter |This is a rare Hamilton Consumer giveaway meant to help the customer see what was in his watch. It has "Hamilton World's First Electric Watch" embedded in plexiglass along with an index wheel, battery, contact & trip wire, and balance coil. It makes for a great conversation piece and is a great way to show others the unique parts found in your vintage Hamilton Electric Watch.