The M with the size stamp sez Milano...the finish is even pretty good. I recently watched a GC go to $3700 on eBay - it was in a little better condition, of course. This is like finding that Rolex President at Salvation Army. Some web sites you'll like:

http://www.sheldonbrown.org/ebay/masi1000/

this one's particularly appropriate:

http://www.campyonly.com/retrobikes/sachs_masi.html

http://www.bates-lee.com/masi/

http://www.classicrendezvous.com/Ita...al_numbers.htm

http://www.bates-lee.com/masi/html/g.../nos_masi.html

and

http://www.rydjor.com/bikecollection/1976masi.htm

I undertook a Cali Masi restoration this winter, and these were the best sites for the restoration research. Man. I thought I stole mine at $250, completely beat and equipped with Shimano 600 stuff!