Schroeder Ratchet Spanner; England. Each end of the spanner has a hole which is not threaded - I assume it was a seat for a nipple on the socket. There is a spring loaded mechanism that holds in the various size sockets. Kind of a unique Spanner. Canadian patent here.
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| thanks, Sean! |
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| Spanner and Wrench Collector |
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That's probably how ratcheting box wrenches are still made.
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