Darby handcuffs i think but not sure!

Hi could anyone idententify these for me please? I've found a couple that look like them but i haven't a clue! There is no markings on them and they are small about 7 1/2" in circumference.

I've just put the full album address here because the last images i uploaded got deleted for being linked images and i wasn't sure of how to put them on here! Please take a look! Thanks for any help.

s1223.photobucket.com/albums/dd519/mickt76/cuffs2/



I think they look like these firman ones: