Watch List notes:

COMMEMORATIVE MEDALS, WORLD MEDALS, France, Conference de Metrologie Practique, Bronze Medal, 1937, obverse by Jules-Clément Chaplain, classical figures with international attributes, rev text, 100mm (Maier 64 for obverse). Extremely fine.
Chaplain's design for the original metre commission was reused for this first conference

Estimate: £100-150