Can you help to identify these frames, bikes or parts?

Don't know, but the seller left the headset races in when he powdercoated it!

Judging by the clearances and pie-plate on the back wheel I'd say a pretty low-end gaspipe model. Possibly not orignal forks.

Thanks - it seems to ride okay for a very old low-end bike, or maybe I am just not very discerning :)

Martin