D1-3 5C Step Collet Adapter For Monarch 10EE Lathe Hardinge Collets

Up for sale is this unmarked 5C step collet adapter with a D1-3 mount. This is in good shape and is ready to use. Came in a lot of Monarch 10EE parts.

I can't see any makers markings on this but it looks like genuine Monarch to my eye.

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