Crown Mason Jar pre-1928 - 3 dots on base meaning?
I just picked up a Crown Mason Jar pre- 1928 (before they started embossing "Made in Canada" on the jars). I have several of Crown jars in my collection but have never seen a base embossed with only 3 dots in a triangle formation. Most have a Dominion Glass (Diamond D) makers mark on them.
Does anyone know what these dots mean and possibly a more accurate date for this jar other than pre-1928?
Also, which forum are we supposed to talk about fruit/mason jars?
Well take this into consideration as for sacristy of this new found design, I'm waiting to hear back on month code for my friends 1965, but the add I've shown is dated Feb. 1966... My stubby is dated...