Most Mondias imported into the US during the 1970s had all Reynolds 531 frames with Campy dropouts.

Your frame was probably a private label model Tour de Suisse with stamped steel dropouts.

Here's a link from 2010 with lots of good speculation:

http://www.bikeforums.net/classic-vi...-question.html

Mondia and several other Swiss makes stamped the serial numbers into the top of the left side seat stays. Here's my bike boom era Mondia Special:


verktyg

Chas.