Identifying Lucky film?

[hamradio]

I've got a random 120 roll of Lucky laying around, out of the packaging.

Any way to determine between shd100 and shd400?

Thanks.

 

[Merkin]

I have absolutely no idea, but if you can't do it, just expose it at ISO 200. One stop off either way should still be printable.

 

[blue4130]

From my understanding, the 400 was discontinued around 4 years ago. If you have a roll that snuck back into your life since then, hard to say. Develop the leader and read the edge?