Packaging shock indicators (Ilkeston DE7 4B)

Teaching aid? Interesting little mechanical curiosities that show if a delicate item has experienced a big shock (impact) during transport. They have all triggered due to rough handling but can be reset with care and a steady hand. One example in the photos has not triggered, but I’ll keep that until all have been gifted. Several available, seven rated at 10g and three rated at 5g. Take one or two as curiosities unless you really have a use for them (I’ll be interested to know) and need all.

Fair Chance Policy: I’ll wait before choosing a recipient to give more people a chance to reply.