You are in the classic Trialsin bicycles headsets corner.
Allen bichromated (yellow chromed) bolts set suitable for classic Trialsin bicycles. Used in first Monty models to fix the handlebar on the fork. Includes the three sizes needed (check measures in the description).
Brand: BIKENBICI
Drive bearings kit for classic Trialsin bicycles. For 1-1/8 inches drive bearings.
Brand: BIKENBICI