Lancaster CHS with unknown cutting and unknown line number. This tray is 12" across, the handle is 4" tall from the surface of the plate.
This sandwich tray is not shown in John P. Zastowney's "Lancaster Glass Company 1908-1937." The book shows a covered relish Lancaster #945 with this style finial on the handle on p. 136, and a matching finial on a Standard sugar & creamer tray #647 on p. 270. Neither of these photos seem to show the point on the lobe at the top of the CHS finial. That may be due to photographic angle.