"What model metronome was used in "Object to be Destroyed?" This could probably be answered by a close inspection of the logo on the gauge at the bottom of the pendulum. Did he use the same model to construct "Indestructible Object?" Highly unlikely. Man Ray made a number of, well, let's call them instantiations, of "Indestructible Object" using readymade metronomes from a number of manufacturers. The trident trademark visible on some is the logo of Ultronic Systems Corporation, which seems to have become defunct by the mid-1960s. The artist is known to have made instantiations with this logo as late as 1971, so we may speculate he acquired a few to keep for use in constructions." - Adriano

but only the 'original' was shot! :-) - Amira