Help, what kind of chisel did I buy? What bevel angle should I grind it to?

This style is known as a "firmer chisel" The square corners make it stronger to stand up to heavier use.

This post from Paul sellers has a section on them https://paulsellers.com/2014/02/many-chisel-choices/

Here is some discussion on grinding angle: http://www.sawmillcreek.org/showthread.php?76831-Firmer-chisel-bevel-angle-question

45 is awfully steep IMO, 25-35 depending on wood/use sounds more reasonable to me.

Not sure on the maker. None with those letters spring to mind

A dull one.

haha. No clue.

Framing slick. Known by a few other names, including timber framing chisel.

Dead giveaway is the angle on the bevel.

That said, you could probably call it a few different names, including firmer, or if you made the angle low enough you could call it a bench chisel.

If you're doing anything with big, rough work, leave the bevel in the 35-45 range. So... it's great for messing with things like heavy workbenches or big timbers. (No duh, right?)

Otherwise, if you only do more normal tasks, but need the ability to whack the chisel harder, drop the chisel angle to something you can use. They're just kind of heavy to be using constantly.

I bought this chisel at Alameda Antiques Faire in California and it looks old. I got this and another big chisel for $25.

It is 1½" wide and about 10" long and the blade is very thick. The stamp on the blade is really worn, I can make out the letters "PAN".

Can anyone provide any information on what kind of chisel is this? Could this be a mortising chisel or a timber framing chisel?

What bevel angle should I grind it to? It is currently at around 45 degrees which is a very high angle for a chisel.

Thanks for any info.