Marlin Daley Bottleneck Handcuffs

This is a very good condition pair of Marlin Daley bottleneck design handcuffs. This is a beautiful design which was also used by the Caveney Invention Company, although those examples use a screw key much like a Darby lock while these use a distinctive two pronged key. 

This pair sold for $337 after 7 bids with one key. 
 

Above, close up detail of the unique end cap keyway and key. 

Below, close up detail of the Marlin Firearms Patented makers mark. 

The Marlin Firearms company in Connecticut, USA was primarily known for their rifles, but these handcuffs and matching leg irons (unbelievably rare) represent a unique design which later inspired the Caveney Invention Company models. 

In 1879, Marlin Firearms filed for patent #222,252 and produced the bottleneck design. This utility patent lasted for 17 years. 

In 1910, George Caveney, of the Caveney Invention Company filed patent #948,310 for a similar design which used a completely different lock (the screw key design) although the silhouette is essentially the same. 

I would love a pair of bottleneck leg irons, but they are so rare that they would likely sell for over $1,000 if not much, much more.