National 56-E-xx key pictures

[ted johnson]

I have made some good progress on determining the Nat’l 56-E-1 thru 16 key cutting patterns. I have a tentative pattern for each of them. However, I need more key pictures to verify my predicted patterns. If you have any of the following keys, 56-E-3, 5, 6, 7, 9, 10, 13, 14 or 15, would you please take a direct overhead picture of it lying flat, along with its key number, and post it here. Also, it would be nice to know if your lock was a 2 or 3 lever tumbler, both can exist, but it’s not necessary. This will help all of us.

I intend to publish the completed pattern chart here so that anybody can use it.

Thanks much for your cooperation…….Ted

[ted johnson]

I received a picture of a 56-E-19 key from garilla. It was a key key helping to define the whole series. Thanks very much.......Ted