Piano piece in tombstone the movie?

I note several sites asking but no clues until I hit on a PianoWorld.com forum...
Josh asked & Wayne answered...'I think it's Chopin's Noctune #19 in E minor, Opus 72 No. 1.'
I believe he is correct. I have been listening to the scene on my DVD of TOMBSTONE versus a great clip of that piece by a brilliant pianist ( 'Sviatoslav Richter plays Chopin Nocturne E Minor, Op. 72, #1' ) on YouTube.
It is hard to be certain considering the wonderfully appropriate tinniness of the poorly maintained upright, the dialogue and Val Kilmer's portrayal of an inebriates version of this nocturne in the film but I think it's a match.
After several reviews of the movie scene and the web clip it seems that Doc is playing early in the piece (about 25 seconds into the clip).
I may be wrong but it was certainly worth watching clips of one my favorite movies and listening to Richter playing anything, let alone Chopin.