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“TTRR”
Steel body. Steel shackle.
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“STPUSYCO”
Brass body. Brass shackle.
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“SVRY” – “ADLAKE”
Steel body. Steel shackle.
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“T&WRY”
Brass body. Brass shackle.
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“SP&S” – “ADLAKE”
Stamped Steel body. Steel shackle.
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“SPCO” – “ADLAKE” – “CS 4S”
Steel body. Steel shackle.
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“SPCO” – “SIGNAL”
Brass body. Brass shackle.
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“SPTCO” – “ADLAKE”
Stamped Steel body. Steel shackle.Patent # 2040482.