I have a 26.6 seatpost, labeled "JPR" at the top and "Made in France by JPR" "81 04" at the bottom. 1981 would be right for the centurion it came with, so maybe "81 04" is a date. This is a 2-bolt post, with 2 allen bolts that enter from the *bottom* of the head and a clamp that clamps upwards, with the fixed support over the saddle rail.
Curious about any history; especially any reputation for breakage.
Also, was it a CR member that picked up the bargain PX-10 at the Cupertino (ROMP) swap?
- Craig Sandvik