Love those Sterlingworths.

By far most Sterly's were extractor guns. Are you sure your's is an ejector gun with broken ejectors? Maybe it actually has extractors? One less thing to fix if it is an extractor gun.

From my limited experience, one of the first and only things to fail on a Sterlingworth is the catch mechanism on the top lever. I imagine the parts wear and after about 100 years the engagement is no longer positive enough to hold the lever in the open position. I've got that problem with the one pictured below, and it is at the gunsmith now for repair.