Stehman, Jenks & Stehman watchmaker's lathe

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Stehman, Jenks & Stehman watchmaker's lathe
Stehman, Jenks & Stehman watchmaker's lathe. Best I have been able to find out is that is from around the 1850s but to no hold me to that. I have been unable to verify an exact age. Very little info online regarding these lathes.  This is the only I have found that has a manual tool reset.  Chuck is free and will open and tighten.  It was very dirty when acquired and has only had a good cleaning.
This is an amazing collector piece or could be put back into service with a little work