I picked up this very fine and early razor a while ago, it was sold by McPherson Brothers Cutlers of Glasgow:
This is a (I would estimate) late 1700s early 1800s Razor with Horn Scales, It hasn't had much use and is even in the original mahogany box and tatty outer card case.
Card Case Reads 'Portable Razors made of the finest Sheffield Steel'
Razor is marked ELLI on the Tang
I presume that as the box states 'Razors' that there may have been a pair of razors in the box, although it looks to be tight for two.
Box has McPherson Brothers, Cutlers Glasgow on the top.
Any information about dating, greatly appreciated.