The mark is confusing, and as Raimey observed the ELG in the oval (without the crown used after 1893) was applied at the time of 3rd Definitive Proof for the finished barrels, and there should be more marks; the Perron and both the EL script and at least 2 inspector's marks, and the bore in mm; just forward of the flats.
J.B. Patton posted images of 2 H&Rs here, neither with the ELG. Daryl posted an image from a catalog.
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=382425&page=1

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