Bert H. said
Dale,
The front sight height was dictated by which specific caliber/cartridge it was made for, and if it is an Sporting Rifle, an Extra Lightweight Rifle, or a Carbine.
The Lyman No. 5 series Combination front sight (formerly the Beach Combination sight) is not out of place on a Model 1886 Sporting Rifle if it also has a Lyman tang sight.
Bert  

A Lyman No. 5 wouldn’t be out of place, but it might not be exactly “right,” because the original Beach was still in production as late, at least, as Nov. 4, 1902–I have one with that patent date stamped on it.  And guess who owned that patent, #712863?  WRA!  This patent pertains only to a method of affixing a metal bead to any front sight, not the basic design of the Beach, long in the public domain.

The original Beach, not Lyman’s copy, is still illustrated in WRA catalogs as late as 1918.  If not for this patent date, I’d assume the illustration was merely an old one that hadn’t been updated, as sometimes happens, but clearly the original Beach was still being manufactured long after Beach’s original patent (1867) had expired, presumably by WRA! 

Lyman Centennial Journal doesn’t provide a specific introduction date for the No. 5, except that it was after 1891 at the earliest, probably later.