10 Lever Ingersoll Impregnable Door Lock Pick and Gut 

Fantastic picking Ash and thanks for sharing mate.

Love the Ingersolls. Great video, have a great weekend 👍

Great job Ash mate nice to see what inside👍👊😊🇬🇧😎

We love Ingersoll locks, not easy to open.... well that one looks doable out did you just make it look easy 😂 Nice one L N.

nice lock, great picking/gutting. have a great day

Nice find ingersoll D20 a 10 detainer lock as the bar is detained in the detainer, good collectable, I have one myself, geat picking to very skilled 👍

Nicely done. Reminds me of the Miwa U9 (less the false gates).

Makes sense that you needed the key to get the core out, that side-bar looks like it holds it in when the key's not in.

The D20 offered a 10lever locking mechanism from either side of the door, unlike the sc71 which could only be double locked on the outside. They were dreadful to fit, i only ever fitted a couple of them...i seem to remember we bought a job lot from Aldridge and were selling them at £10.75, which was slightly cheaper than the sc71 at that time...

Nice lock. I wonder if its been used on a cell door of some sort, with what you called the inside actually being the outside.

Anyone else taken back to 1980s caravan holidays 😅

Sounds like hotels in the US need to use those instead of cards.

Is that an ingersoll D20 ? they was obsolete when i started in this trade in 1986

What is the arrangement of the levers such that the key can be inserted one way up from one side and the other way up from the other side? Does this restrict the number of differs? I had such a lock on my door in 1957 and have wondered from then how this is done. Ingersoll locks are rare these days (and very expensive). They can be double-locked from either side and thus cannot be opened (using the handle) from the inside in this state. In the ASSA locks there can be a snib (thumb-turn) on the inside so that, in public buildings, people can easily escape. The locks were used by the American forces. Anthony Bushell

The D20 was the most unreliable lock ever!! It was made obsolete in the early 1980's

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Is it a candidate for bypass. 🇺🇸