Dr. Q. Wonder Slates. Los Angeles: F.G. Thayer, ca. 1940.
Mechanical spirit slates in hardwood frames with mitered corners and red felt binding. Concealed locking mechanism allows the slates to be shown cleanly before the appearance of writing. Designed by Carl Owen. 10 × 8”. Slates near fine; unused, no chalk marks. A particularly clean example.
Dr. Q. Wonder Slates. Los Angeles: F.G. Thayer, ca. 1940.
Mechanical spirit slates in hardwood frames with mitered corners and red felt binding. Concealed locking mechanism allows the slates to be shown cleanly before the appearance of writing. Designed by Carl Owen. 10 × 8”. Slates near fine; unused, no chalk marks. A particularly clean example.
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