“MASTER ProSeries”
Brass body. Steel shackle.Patent #D515908.
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“MASTER”
Steel body. Steel shackle. Brass Dial.Patent #D95463. US Patent #2105337. US Patent #2113864. US Patent #2127089. US Patent #2127091. US Patent #2169907. US Patent #2893231. US Patent #3563067.
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“MASTER LOCK
..”. Steel body. Steel shackle.Patent #D437768.
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“MASTER”
Steel body. Steel shackle. Steel Dial. Key operated. Salesman sample.Patent #D95463. US Patent #2487608.
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“MASTER”
Steel body. Steel shackle. Steel Dial.Patent #D521359. US Patent #D507473. US Patent #D507474. US Patent #D506667. US Patent #D506122.