[78-L] Grey Gull 4114 - 1920?

[78records at cdbpdx.com]

Is SUPREME (Grey Gull) 4114, matrix 41512 an exceptional acoustic recording from 1920 or an electrical recording from a later date?  My example is on Grey Gull's SUPREME label and, if you wouldn't mind a trip to YouTube, can be heard here:
 
http://www.youtube.com/watch?v=ns-AFQYakOI
 
Thanks!
 
CDB