Chromed steel Headset with unknown thread probabaly from the 1940s, 1950s or 1960s tektro This rear derailleur is NOS

This rear derailleur is NOS (New Old Stock) and comes in the original box | some signs of age and storage | see pictures

Mavic bottom bracket spindle included | see pictures

same model has been used on Chours hubs and later also on Athena under the part no

Small hole on the front end

Campagnolo 10-speed

Chromed steel Headset with unknown thread probabaly from the 1940s, 1950s or 1960s tektro This rear derailleur is NOSWeight Gewicht : 167 g Size Gre : 1"Crown race Gabelkonus : 26. 7 mmStack height Einbauhhe : 38. 5 mmThreading Gewindesteigung : Unknown a little to tight for Italian slash english thread and too loose for french, might be similliar to the old raleigh thread (25,4x26tpi) ?! Unbekanntes Gewinde ein biscehn zu eng fr italienisches bzw britisches Gewinde und zu locker fr franzsisches, vielleicht sowas hnliches wie altes Raleigh Gewinde (25,4x26tpi) ?!