20s vintage Scottish Tartans, family clan name patterns, color illustrations

The Scottish Tartans - With Historical Sketches of the Clans and Families of Scotland - The Badges and Arms of the Chiefs of the Clans and Families, illustrated by William Semple, published by W. & A. K. Johnston Ltd. of Edinburgh. This is vintage 1920's at our best guess? (We can't find a date on this anywhere.)

The book measures 6" long x 4 1/4", like an old-fashioned field guide. 120 pages, all in color, with beautiful old illustrations, and many, many family names with their tartan patterns.

This is in nice clean shape overall, does have an old penciled catalog number and an old price marked on the end paper.