Here is another one of the I am not sure. A friend told me it was a 50 but it is not marked. Yes there is staining from sitting but the shank is as smooth as a baby's ass!
Adapt Smaller Morse Taper Shank Tools to Larger Machine Spindles.Oil Toughened and Externally Precision Ground with Hardened Tang.Outside Morse Taper Sizes Are 1 Through 6; Inside Morse Taper Sizes Are 0 Through 5.
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