Following is what Pipedia states. I have a couple of Sasienis that match the following description of 'four dot' pipes, but certainly Pipedia could be wrong and my patent 'four dot' pipes could be post-war.Dl you have a picture? I'd like to see that. I've never seen a pre war Sasieni with a "four dot" stamp on it
When it comes to this sort of stuff, I certainly defer to the experts over Pipedia.
"Both the Eight Dot and the Four Dot were marketed in the U. S. during the pre-war years, with the Eight Dot fetching more money, even though both pipes used the same wood."
"All Sasieni One, Four, and Eight Dot pipes made before W.W.II and destined for the U. S. market carried a patent number on the shank which usually started with the numbers “15″, with 150221/20 and 1513428 being representative of the group. Also, the name “Sasieni” was stamped on the shank in a very florid manner, with the tail of the last “i” sweeping underneath the name forming a shape which has been compared to a fish by more than one collector. This script was discontinued by Alfred almost immediately after he took over the company, so this alone tells you your pipe is pre W.W.II. "