Thanks to the very kind efforts of (Mark) Mr. Pugwash, Mr. Charles Williams, and Mr. Richard Newgass I have been sent a copy of the W J Jeffery daybook page for my Jeffery .577BPE #2457
Interesting in that it does confirm that it is in fact original in .577 3 1/4" BPE, 6 1/2 Dram 650 grain bullet. Made by "Ellis" (Richard Ellis?) for Jeffery and completed on 20Feb1896
Note that "Ellis" is the principal maker for all the guns and rifles at this time block.