Several holdover features from the first gen 327's and early 323's. Such as flat filler bung, round face valve wheel, and lighting door frame. New features that started showing up around August of 1917 are the hex filler cap, 7/16" gland nut with valve safety stop, and second generation Quicklite mixing chamber with shorter 3" burner tubes. Here is the first variant of QL327 in the link below if one was interested in comparing the two. Mid 1916 - mid 1917 U.S. 327
That is lovely, just the right balance of age and patina. It's spurring me on to finish my 20s 327 Alec.
It always amazes me about QL's that you can buy one today and get that 100 year old lantern to run again with the snap of a finger. Coleman magic.