Bret Devereaux

Oh my, let me tell you about how much of an unholy pain in the 1/4ths-setertius figuring out common weights for archaeological artifact types can be (because I spent literally several years tracking this information down for all sorts of arms and armor)!https://twitter.com/BeijingPalmer/status/1344459527652069379 …

As near as I can tell, the issue is that mass isn't generally typologically distinctive - it won't tell you if you are looking at a bell or a chime, and it won't tell you if you are looking at a pot c. 110 BC vs. 75 BC.

As a result, that information often doesn't make it into publication, whereas more regular measurements (height, width, depth, etc.) do. And of course, big type-studies (your "I have compiled every example of X artifact studies) don't generally record it either.