I have an old East German Diamant track Frame. Diamant is now owned by Trek, Trek ownership made possible by the fall of the Communist Block. The story I got was that this frame was stripped in order to make a complete bike for the Bulgarian Bicycle Museum. Both the one in the museum and the frame I have were supposedly originally owned by Dimo Angelov (Bulgarian 1000 meter sprint specialist in the 50s and early 60s) and the frame was put up for auction on eBay by the Bulgarian Bicycle Museum (if such a thing exists). They even showed a picture of the restored bike supposedly in the museum. It's reputed to have a glorious history with many East Block records and wins. Makes a nice story but I have no documentation and I'm sure it is BS. Anyway, it was cheap as the BB was ferociously stuck. I got it for way less than a vintage track fork. It took many weeks of soaking, heat, pounding, daily ultrasonic vibration and it was still stuck. A bench vice and using the frame for leverage got me nowhere, it kept popping out of the heavy duty bench vice. The whole work bench would move, twist and heave. I was afraid of rounding it so I took it to the LBS and they took turns for a week letting different young, strong mechanics try it with the correct tool. It finally came loose. I was ready to weld square tubing on the BB and use that as a wrench. The fork paint is drying in my shop and will be brought inside tomorrow to put by the heater. It won't dry fast enough at 40F at night. I'm pretty sure I have everything I need to assemble it. I want different track wheels but I have a good set to use until I get what I want. I'm thinking of using everything track except I don't want a fixed gear bike. I'm thinking about using a BMX single speed freewheel. For brakes I have a 1920s set of German bolt on center pull units as the frame has no holes for mounting brakes and I don't want to drill any. That's about it for the concept. As soon as the fork is dry I'll start assembling it. I hope it goes fast and easy. The headset will take some head scratching as the original cups were rusty and new ones didn't fit right. Commie junk specs. The stuck BB was more of a headache than many bike builds already so one can hope for Karma. Diamant is a common brand, all different countries, German, French, Dutch and Belgian and maybe others. All different brands and not related to each other. Kinda weird. When I bought it I didn't realize how expensive vintage track frames are and just bought it because it looked cool and was cheap. It's a little big for me by road size measurements , especially since you usually use a smaller track frame than comparable road frame. I hope it's not too huge for me. Dimo below.