retro mid-century K + E Keuffel & Esser tape measure w/spirit level

intage 1950s or 1960s Keuffel & Esser tape measure case with a fluid filed spirit level in the top of the metal case. The case is marked with a US patent number from 1958.

The measuring tape has been replaced with a 10 foot Stanley Life Guard tape, but this still looks good and works great.