Vintage ADLAKE Frisco Railroad Switch lock and spike chain shops 1978. No key. Vintage St Louis San Francisco RR lock stamped Frisco on reverse

Vintage ADLAKE Frisco Railroad Switch lock and spike chain 1978. shops No key. Vintage St Louis San Francisco RR lock stamped Frisco on reverse. Pat. can be seen but number unreadable. The rivet on the front says 78. Great addition for the railroad collector. I have no additional info on this lock and I am not a railroad lock collector. If you have questions please let me know.