Harvard Lock Company (transport restraint and individual set, Straus set

This is a rare combination from Harvard Lock Company. While these basic, functional swing through ratcheting double lock handcuffs and leg cuffs are seen somewhat regularly as New Old Stock, the combination is quite rare. 

It sold for $131.39 after 8 bids. 

 Above, view of the basic but unique design for the cuffs. Note the solid chain connection to the cuff body as well as the swivel and the fine long link twist link chain. 

Above, here is a Harvard Lock Company set without the factory connection chain seen above. These items are not so rare, although interestingly the handcuffs are more uncommon than the leg irons, whereas in the case of most antique and vintage restraints the opposite is true. 

Harvard Lock Company was an industrial foundry producing a range of hardware in both New York, New York, and Reading, PA. Along with large amounts of padlocks, both brass and steel, they made cabinet locks and door hardware, as well as leather, canvas and felted goods for police and military. 

During WW2, Harvard Lock Company won contracts to produce restraints for the US Navy and US Army, which explains the relatively high supply of New Old Stock Harvard Lock Company Leg Irons. 

This set sold for $59.89 after 17 bids with one original key which operates both restraints. This is less than half the price for the Harvard Lock Company combination above, illustrating how these are one of the more common collectors items and don't command a high price even when they're more rare (like the combination) as compared to even the alloy Darby combinations seen recently. 

Below, these are a very similar design from Strauss Engineering. They use a flat key, have no swivels, and the handcuffs have an elongated twist link chain. 

This trio sold for $169.16 with two keys after 14 bids 

These have a double lock activated by key in the keyhole turning opposite direction. Note the same  attachment as well as similarities in the lock case to the Harvard Lock Company cuffs above. 

Above, view of the leg irons and two handcuffs. The Straus Engineering restraints were electroplated with a thick cadmium layer to prevent corrosion in military use. Some reports suggest they are entirely made of cadmium but this would be impractical. 

Again, this is two handcuffs and a leg iron WITH keys and it's not entirely common, but still this is like $56/restraint, not a lot of demand for these designs at this time. 

Above, a pair of Harvard Lock Company Handcuffs with a modern key. This is incorrect. The key will open the single lock, but if the double lock is applied ( via the key in the keyway, opposite direction) it's possible for the key flag to slip past the double locking lever and become stuck in the lock. It's possible to free it with some force and or finesse depending. 

This pair is listed with an starting bid of $45. 

Above, Harvard Lock Company New York makers mark stamp.