Our model numbers can be a mystery until they are properly explained. 
Here is a quick tutorial on how the nomenclature works for our Atlas and Passport guitars:
For example, a C25 / SSe : 
Concert / standard depth / soft cutaway /  sitka spruce / electronics.
Body Style
C- Concert Body
D- Dreadnought
J – Jumbo
BJ – Bass Jumbo
Body Depth
2 – Standard Body Depth
3 – Deep Body Depth
Cutaway Style
0 – Non Cutaway
2- Sharp Cutaway
5- Soft Cutaway
Solid or Laminate back and sides
0 – Laminate back and sides
No number indicates that the back is solid wood (Only the Stage C25/D25 have solid backs)
Top Wood
C – Cedar
S – Sitka
E- Englemann
Back and Side woods
M – Mahogany
R- Rosewood
F – Flamed Maple
e – Electronics