I recently picked up a late-60s PX10 frame with Nervex Pro lugs and the thrumb rest on the LH rear drop-out - perhaps from around 1968, but I'm not 100% sure.
To help me pin it down, does anyone know what time frame the head badge was still being riveted in place? Here's a pic to show what I mean:
You can see the two rivet marks, plus a slightly cryptic 'RE' - but no other marks.
Here's the complete frame after stripping the refinish (sprayed over the chrome..) and cleaning things up ready for a more period-correct paint job - once I know the period!
Any suggestions very gratefully received - I can supply more pics if that helps things along.