Fowler's "Twelve Ten" Calculator / Slide Rule

Made By Fowler & Co. Manchester

This would have been used by arhitects and surveyors and is likely to be late 1930's / 1940's.

This is 3 3/8" diameter.

Chrome does have light scratch marks bu nothing major.

It does have the leather case but the stitching has come off of one side and also the strap, it can be mended but still protects it as is.