I needed a ring for a Copal 3 shutter that I bought (and still haven’t found a proper ring) but these two certainly aren’t the right ones. The aluminum one has a spacer and a threaded ring that goes around the outside. It is 61.25mm across the inside where the threads are.
The flange mount one is 60.15mm across the inside where the threads are and also doesn’t fit on the shutter that I have.
Both rings shipped (in the US) for $26.00

The flange mount one is 60.15mm across the inside where the threads are and also doesn’t fit on the shutter that I have.
Both rings shipped (in the US) for $26.00

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