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Training Thumbcuffs made in Japan:

Here they are:

That would fit my first thought: AF => all faked... Happy Fool's Day Björn

The temperature specification is funny - a gas lighter should be sufficient to get out of these toys.

Stan Willis put up the list here: https://www.tapatalk.com/groups/handcuffsforum/mckenzie-mitts-t3021-s20.html Björn

I would try it the way shown here, but with metal springs: https://www.thingiverse.com/thing:2487050

You've been asked to sell a pair of Iver Johnson handcuffs...

Let's add Kansas: The McKenzie Mitts were inventented by J.O. McKenzie from Phillipsburg, Kansas.

Richard, you'll find the 1953 patent file for your Kurt Metk leg irons here: https://depatisnet.dpma.de/DepatisNet/d ... 001652585U /R Björn

Some more background: - 1910 Patent - Advertisement letter from the inventor Reinhold Heid about the advantages of his nipper , available on Atame's splendid homepage Best regards Bjoern

My great sense of empathy & willingness to help find their limits when I receive personal messages from strangers that turn out to be bulk messages...

Hi Richard, you'll find information about Clejuso darbies on these splendid German websites, too: Atame's collection: http://www.atame.info/CU_Deutschland1.htm Enris' collection: http://www.handschellen.org/sammlung/cjs04.html…

Hi Mark, you may want to ask this gentleman, who currently has a pair of model K for sale in the german collectors forum: https://www.handschellenforum.de/forum/ ... c148904de8 Greetings Björn

Hi Ryan, there are four combinations of Tower keys, which differ by the position/absence of the key bit. A few years ago the ebay seller "erestraints" had a set of this keys for…

Hi Nils, this is a picture with measurements from the key that came with my McKenzie Mitts. This kind of key is shown on most McKenzie Mitts with key pictures I have seen, so…

It looks like a Heinkel nipper, patented 12 Oct 1964. This is the link to the patent document: https://worldwide.espacenet.com/publicationDetails/biblio?II=0&ND=3&adjacent=true&locale=en_EP&FT…

The engraved horse is highly likely not a manufacturer's mark. It is the coat of arms of Lower Saxony, a federal state of Germany . Günter (Atame) has more information about Carl Reher & Heinrich…

Hmmm, these didn't show up in my eBay search results... Anyway, there was no description of operability & without key you won't be able to make the seller responsible if the locking mechanism…

Hi there, 3D-printing might be an option, but due to thin key walls I'd rather try CNC-milling steel or high strength aluminum alloy (EN AW7075) instead of printing plastics. Anyhow, here…

Hi there, this model is called "BONOWI Handfessel, Modell 2000". It's supposably been manufactured by ZH BREN Brno/Alfa Proj. According to the Internet Wayback Machine it was available from 18 Jan 2001…

This informative article by Marc Lyon will be helpful to you. There are several excellent restraint collections in the web , that provide very good information, however, be aware that these pages also could create…

Hi, you may want to try this: 1. Try to close the handcuff and turn the key back simultaniously. 2. In case the key is still stuck and the arm comes free apply pressure…

F_22_Falcon, first of all welcome to the forum... Tower made several handcuff models. Before finding a matching key you'll need to identify which model of Tower handcuffs your grandfather owns. Joe…

Hi Ron, you could check the length of the main spring by disassambling the bows or just by testing the depth of the boreholes, e.g. by inserting a piece of wire as a…

Hi there, the patent # is DE000001904428. Patent date is 30.06.1964. This link will lead to the patent pdf-document: https://depatisnet.dpma.de/DepatisNet/depatisnet?window=1&space=menu&content=treffer&action…

Hi there, the Heid & Roth patents date from 1912, 1951 & 1964. You might identify your specimen by comparing it with the patent documents. They are available in the german patent office online database: https…

Hi Joe, the rust remover from this guy worked very well on my rusty collection pieces: https://chema-shop.de/html/entrostungs- ... ittel.html Items like your ball&chain would need just a short…

Hi there, there are two ways to get a stuck key out of Kyung Chang handcuffs: Off-hand: Press a screwdriver against the locking pawls & turn back the free key. On-hand: Turn the…

Unfortunately I've not been able to acquire a set of Berliners, so far... Therefore I can only contribute the link to Emanuel Pechnik's patent for his "Berliners". Fun fact: According to the…

Reading this and other waste of time postings I wonder if Tapatalk is using some kind of artificial intelligence in order to start or keep up discussions in their forums. It would make sense…