Yale Junior/Master 77
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The first lock is my green Yale Junior. You can clearly see it is marked with "Disc Tumbler" and other such markings. I'm not sure of it's true age, but it's a very cool lock.
The second lock in my Master 77. I am not sure of it's age, but I've heard conflicting stories. I've heard it was a high price lock to a collector, then I've heard it was junk, so who knows. On the reverse side it is marked with MasterLockCo. Milwaukee, Wis. MADE IN U.S.A. PATENTED. Then, underneath that, it has a code of 5283. Any information on this lock would be great. I've been wanting to make a key for it for a while. I've had no luck picking it, though I haven't tried in quite some time.