F13 gear box how do you tell if a cr or wr

[Danny s-p]

as above and were is the code stamped as i have cr one already (was told this by the sealer). but i just pulled what i thort was a F15 out my shed to fined out it is a F13 so i wood like to no if it is a wr or cr box any help pleases

[garyc]

http://homepage.ntlworld.com/garyc/boxcode.jpg

[pikey1986]

as you look at the end plate it is stamped on a tab just underneath iirc

[Danny s-p]

thanks

[Jedro]

whats that one you've got danny?