I'm working on understanding too much about the Master 175 sesame style locks. I am away the design has changed a bit, but unaware of how to date the lock based on Master's markings. I have a number of locks of this model from the past year or two.
1) Can anyone tell me about how they are marked based on manufacture date or changes to the design?
2) Any information on how the design was changed would be great.
I am also looking at the CCL Sesame and Abus Sesame locks. I have developed a decoding process(based on others techniques), which I am slowly convincing myself to document for presentation at a conference.