Quote:
I cant find a town named Thomas in California.
From 10 April 1907 to 30 September 1913, a town called
Thomasson existed in Solono County, California. The town had one 31 mm CDS. There is no other post marking device mentioned.
So it is possible you have a partial strike.
My source is John H. Williams'
California Town Postmarks 1849 - 1935