Yes two available versions have darkened caseback crystal
To get info about any PAM rep you can read PAM GUIDE, you have thre all info:
"Reference PAM REVIEW-GUIDE" - Replica Search, Identification, Evaluation & Selection
http://forum.replica-watch.info/vb/showthread.php/reference-pam-review-107365?t=107365
EDITED : IT IS NOT YET CONFIRMED THE DARKENED CASEBACK IN KW VERSION WITH PR INDICATOR. SORRY, MAYBE IS A MISTAKE
ALE
ALE
Thanks a lot.
Anyway, I hope 441 will be repped in composite in the near future...