On 2018-12-03, wrote:
Old Supergo Access hardtail MTB made from Columbus Cromor, with a top peg brazed behind the seat tube. Gotta be Shrader. Top and bottom mounts look like this:

https://www.dropbox.com/s/1uljlj761ucw49t/BB.jpg?dl=0

https://www.dropbox.com/s/o0vzchu04er2gr2/ST.jpg?dl=0

The top mount is a standard frame pump peg. The bottom plate is a
kickstand plate rather than a pump mount. The non-drive chainstay
should have a ridge or spine upon which to mount the other end of the
pump. In your image it's hard to see if that's true, but I think so.

The pump would be a Silca or Zefal frame pump, probably Zefal for
Schrader valves.
http://www.yellowjersey.org/hpx.html
http://www.yellowjersey.org/silca.html

--
Gregory S. Sutter Mostly Harmless

http://zer0.org/~gsutter/