Lawrence Flashrule slide rule for photographic use
Lawrence Flashrule slide rule for photographic use, copyright 1946 by Lawrence Engineering Service, made in Peru, Indiana.
Lawrence Flashrule slide rule for photographic use
- manufacturer:
- Lawrence Engineering Service
Lawrence Flashrule slide rule for photographic use, copyright 1946 by Lawrence Engineering Service, made in Peru, Indiana, in original paper holder
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Paper holder for Lawrence Flashrule slide rule for photographic use
Original paper holder for Lawrence Flashrule slide rule for photographic use, copyright 1946 by Lawrence Engineering Service, made in Peru, Indiana.
