How to identify a Norton?

[Finnigan]

I inhereted some old stones. One is a ~7"x2" stone in an aluminum case that was very dirty. I washed it off with some dish detergend and discovered it is a Norton. However, if there was a grade marking, it has since worn off. Is there any way to identify the stone? It appears that it is NOT a dual grade stone (two glued together). it is sort of a brownish orangy color as far as I can tell (it's still a bit dirty, and I'm color deficient.)

[BOGARTUS]

post a picture

[Finnigan]

I'll try to get one up soon.

[bjrn]

Orange-brownish sounds like a Norton India or perhaps Queer Creek. I think both are quite coarse.

[ouch]

It's easy.

[papasmurf]

It's easy.



I like this one better


http://www.loti.com/articles/Jackie_Gleason_html_mfe5340.jpg

[Dead Ed]

It's easy.

Hmmm, I don't remember the norton commando having Ohlins suspension! :biggrin:

[gugi]

ok, since i've got nothing smart to add i'll tell you how i'd check the grit of a stone - hone something and look at the scratch marks under a microscope (before and after so that you know you're looking at the scratch pattern of that stone), their size will tell you the grit size.

[sebell]

Older 8k Nortons may have also had that
appearance.

- Scott