You "mud men" helped me identify the one on the left two years ago as a Thomas M-2340 (and I thank you!). Now we have a similarly glazed but smaller unit on the right of it's "big brother"; the new guy measures approximately 6-3/8" tall, by 7" across the umbrella, and 5 " across the base. The only marking is a set of two parallel lines incused on the inner surface of the umbrella (like this // only straight, not angled), and it also has a blue jean seam on the inside of the base skirt. A local collector tells me it's a good one too, but can't recall the M number. Any help? See also the next pic for a view of the top.