October 8, 2015
1627 100th Avenue
There are a couple more of these General Concrete Company marks on this block, all of them obscure.
October 7, 2015
1417 100th Avenue
This same year, Moniz and Johnson used a proper stamp, unlike most of Arthur Moniz’s collaborations. The risk with hand-drawn marks was that names could be misspelled.
October 6, 2015
9845 Walnut Street
Here George Riding added the month and day to his mark.
October 5, 2015
10212 Walnut Street
This appears to be the first year F. E. Flaherty abandoned his old racetrack mark. Sometimes he used his initials, sometimes not.
October 3, 2015
1427 103rd Avenue
This mark pushes back Otto Hennig’s dates back a few years.
October 2, 2015
1612 100th Avenue
Assuming I’m correct with the date, this mark establishes F. E. Flaherty at a very early time indeed.