I have 4 locks that I hope someone can provide some insight as to the age or approximate year of manufacture.
The first lock is a Gougler Red Dot with Westinghouse imprinted on the face. The back states "Gougler Keyless Locks, Kent, Ohio with the two patents 1,825,457 and 1, 929,598 listed on one line. The code for this lock is imprinted at the bottom of the case - not on front or back plate - on bottom - and is 11772. The shank appears to be hardened steel.
The second lock is also a Gougler Red Dot with Westinghouse imprinted on the face. The back is the same as the first with "Gougler Keyless Locks, Kent, Ohio and the same two patents listed on one line. However, the code is on the shank. It is difficult to make out. Guessing it to be 183, although with a little imagination it could be 194? This shank is rusty and pitted. It does not appear to be hardened steel. Because of the roughness of the shank it is difficult to read. There appears to be markings suggesting some word imprinted on the shank …. but it may just be ragged from wear.
The third lock is a Miller Red Dot. The back is imprinted with "Miller Keyless Locks, Columbus, Ohio. It also lists the same patent numbers on the same line. The code is on the shank and is 6002. The shank appears to be hardened steel. From the front of these 3 red dot locks, they all appear almost identical except for the one rusty shank.
The fourth lock is a Slaymaker with 4 pins on front face. The back is diamond etched and imprinted with “Slaymaker” and a second outlined oval shape has “Made in the U.S.A.” The numbers on the face dial starts with 4, and continues through with 8,12,16,20,24,28,32,36,40,44,48. There is no noticable code imprinted anywhere on this lock.
Do the code numbers provide any indication as to the year of manufacture? Any ideas greatly appreciated! Thank you!