OTC video

I hope this works on the new forum format

Nicely done.  There are indeed lots of Darby variations.
Joe

Nice video, Arioch! Indeed, the Darby design had a lot of different swivel variations. Thicknesses, sizes and designs. When I started to collect, I was really surprised at how late Hiatt had made the Darby cuffs! I figured that the design would have been outdated and long gone by then. Darbys always remind me of Houdini.
-Richard Knip-

Arioch:

Whenever I hear the city/state: "Holyoke, Mass."..naturally Sid Radner comes to mind.....Did you receive them from the Radner family?

Here's a tip (and it looks like you did this): Whenever you encounter handcuffs (especially antiques), always check first if they are GAFFED or not. Many times, a seller has shown me handcuffs that were gaffed, without his knowledge. 
(There are at least 3 common ways that Darbies can be 'tricked' to open without keys)

Keep those videos coming, I always watch them.

Those swivels with the join in the middle are used on all 6 of my heavy backstrap cuffs dated 1860, 1896 up to WW1, 1914 and 1916.
All Military and Civilian (M&C) use. Every other old cuff I have uses the split pin within the swivel. Paul

Nice!