Hello,
That cel is from Sailor Stars (at least the 
Eternal Moon Layer) but the Chibi Moon is a 
completely different scene. Chibi Moon was never 
with EternalSM. Is that a two layer cel? If it is 
then Chibi Moon looks like she is from Super S. 
Moon never goes eternal with Chibi there. Gomen 
nasai! I have talked your ear off about this cel. 
If it is two layers you got two different SM 
cels. ^__^ They do look good together though!