In 1981, I had to manage the electric spare parts of the factory Reckitt and Colman in Chartres (28 Eure et Loir - France. In the store, top of a rack, I found this measuring apparatus. The electricians indicated me that these apparatus came from the old factory and that they were in the store since twenty years. I asked Jean-Louis TOURNAY, electrician, to throw them to garbage, then I went to do some administrative work in my office. After one hour, I had some remorses and I asked to Jean-Louis what he had done of the measuring apparatus. "I delicately deposited them in the refuse collecting tank" he answered me. To my request, It went to recover them and since then, these two apparatus appear in a good place in my souvenirs collection.