Hi, I just picked up my first bicycle to build, but I'm having a hard time identifying it. There are stamps on the bottom bracket of G PO E7 and upside down of these is 10 10 0. The head tube has an M stamped on it sideways. Here's a picture and any help would be appreciated. Thanks, Dave
![DSC03211.jpg](https://proxy.imagearchive.com/38d/38dac7ab46cc63365030cafe9e60bcc0.jpg)