Martin’s technical scales, made in Australia c.1930s
Eyre & Spottiswoode Publishers Ltd draughtsman’s set of cardboard scales, made in London c.1920s
Both sets of cardboard scales are complete, having a series of scales from A – H, and come in their original boxes. Cardboard scales were used before plastic scales took over, and it’s rare to find complete sets which aren’t too battered. I confess to loving scales- it’s something to do with the detail and their mechanical nature, and of course nostalgia…these days all my drawing is digital and one rarely uses physical scale rules.
The British set of scales was owned by one F. Gelburn, who attended the British Institute of Engineering Technology.
For sale: $AUD75
re:retro 
I have some of these… I can never resist slide rules etc when I see them….
i love scales too…i use scale rulers with my landscape drawings – so vintage scales have extra appeal…