I have had these in a box in the garage for years, I am sure they a spare parts for something or other. I am guessing that they are American made from the OS codes and are spares for something. Now just from the information on the lids its possible glean that one is an some sort of little motor and the other is some part of a wind gauge. Extremely nicely made things but I have no knowledge what they were for ??? If anyone one recognises them or has any knowledge, Any information would be great .