I engraved with a 90° #1 for 25 years.
I started with #2 when GRS introduced their EasyGraver fixture, which I wanted the speed and convenience of. I can engrave equally well with either geometry but as Roger pointed out, #2 is well suited for flare cuts.
I engraved for 25 years with a 90° graver. I now use a 120° for most things, but there's absolutely nothing wrong with using a common square graver your entire career. And there's nothing wrong with a 105, 116, or 133.92724°. Use what works best for you.
I will second what Jerry said above. If...
Axes are typically hardened steel which makes them nearly impossible to hand engrave. As SamW said, acid etching might be your only option. Personally, I would never attempt this unless I knew for certain the steel was a mild, engravable steel.
I might buy a crowbar or something but I wouldn't buy a lathe or anything like that.
Abigail bought a steel stand for her workshop and none of the parts fit and it was a royal PITA to assemble. I just don't understand how the manufacturer in China can't get it right on something as basic and...