RICOH THETA models are identifiable by the two initial letters of the serial number on the bottom of each camera body.
Two initial letters Models
YR RICOH THETA X
YP RICOH THETA SC2
YN RICOH THETA Z1 (YN1, YN2 : 19GB model / YN3 : 51GB model)
YL RICOH THETA V
YJ RICOH THETA SC
XS RICOH THETA S
XN RICOH THETA m15
XL RICOH THETA (2013 model)
Example : RICOH THETA V