I have been really digging the old school MTB frames lately and scored this off of CL the other day for a really great price! From what I have found it is a 1985 Diamondback Apex that is completely original, even the tires! The seatpost is fairly scratched up but otherwise it is in good shape. There are some scratches to the paint but nothing too bad. I will be building it up as a drop bar conversion with some nice parts but wanted to document the conversion from start to finish. I really like some of the details on this bike especially the chainstay protector/spoke holder. The stem is also interesting(Nitto?), it is basically a 1" threadless stem that has a quill steer tube that it clamps to. I have a nice dirt drop setup that I was going to use on it but I might try and make the original work. I have also seen these with two bottle bosses on the down tube so not sure if that denotes the year or not.

I will post more pics as I build it up and please let me know if you have any vintage Diamondback info or catalog pics.

Parts break down:

Tange butted tubing
Shimano deer head front and rear derailleur
Shimano Deore cranks with biopace rings
Shimano Deore front canti brakes
Suntour XCII pedals
Suzue Sealed hubs laced to Araya rims
Nitto? Stem and riser bars
Shimano Deore brake levers
Shimano Deore Thumb Shifters
Suntour Rollercam Rear Brake (Chainstay mounted)