[Leica] OT Old film development

[dnaplasmid at compwrx.com (Aram Langhans)]

While going through a drawer in my parent's house I happened upon some 
exposed roll film.  The label you lick and close the roll simply says (in 
sort of a cursive print) - Panchromatic, Exposed, Made in Belgium.  No film 
speed.  No brand name.  Yellow paper film backing and white label.  3 rolls 
are 127 and one is 120.

Any ideas on how I might devlop them?  Anybody remember what that film might 
be?  Got to be 20 years old or more.  Any hope of an image?  The room where 
it was found does get fairly hot in the summer.

Aram