The box is marked M56-a Watch Oil, Elgin National Watch Co. Elgin U.S.A. Inside the box is the bottle of watch oil marked M56-s PAT. PENDING, and
Elgin M-56b US Patent - Lubrication Tools and Products - Watch Repair Talk
Lubricants - Page 18 - Lubrication Tools and Products - Watch Repair Talk
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[SOTC] What should I add next? : r/Watches
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Lubricants - Page 18 - Lubrication Tools and Products - Watch Repair Talk
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