Haven't seen this one in a long time

About 1980 I was a hobbyist frame builder and a guy I worked with was a cat-1 racer doing cyclocross. He was open to me building him a frame to race on so I did. I really didn't know how to build a proper 'cross bike so the first one was a failure. This is the second one-much different than the first and only a bit more successful. The big difference is that this one is still rideable while the first one would up in the recycling pile and never was ridden again. The first frame was too steep and twitchy so I made this one long and slack. It was pretty good in the mud but still a primitive effort. It did get ridden and it has withstood several owners and over 40 years.
 

I'm not 100% sure what number frame this one is but I'll guess in is one of the first 15 frames I have built. I spray painted it in my driveway and it still seems to have not been re-painted.

I was so discouraged after my first two 'cross bike attempts that I did not build another one for about 5-6 years. I think I have a pretty good grasp of what it takes to build a 'cross frame now. Failing on those first two was all I needed to get inspired to eventually become fluent in 'cross bike geometry and riding characteristics. 

I'm really happy that this bike found a new owner who really cherishes it.