Offered is this set of three hand-drawn pencil industrial drawings or diagrams for an unnamed machine (or perhaps three machines?). They are not labeled (except for "Fig. 1" and "Fig. 3"; the other is unnamed), so I don't know who drew them or when. Each is on a piece of heavy stock paper embossed with "Strathmore Patent Office" around a thistle symbol. Since they are not dated I don't know how old they are for sure but they were found with other items from the 1950s and they certainly appear to be old enough to be vintage.

Each drawing is approx. 15" x 10". All are in good condition, with no tears or holes, but they do have some wrinkles and small corner creases. The paper has yellowed and is lightly soiled in places.

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