Twins

It's a long story but to cut it short. Before I retired in 1987, I spotted the pen in rolled gold and bought it, at quite a hefty price too. Some few years later it vanished, so since I was used to it, I bought another almost identical one. 3 weeks later I called on a customer who presented me with the original one, which had disappeared. It seems I made out an order, using the top of his freezer chest as a desk and he had to go into the freezer before I left the premises, the pen then rolled off behind the chest and only when they moved it to clean behind it, did they spot it on the floor...