WRT160NL

r33555                     >>>
7.9 MB (7,930,880 bytes)   >>>                                      <<<   ->Oops: flash id 0xc22017 . 
                                 >>>  will install fine on all  <<<<               and
r34311                     >>>                                      <<<   ->Oops: flash id 0x1c2017 .
7.9 MB (7,885,824 bytes)   >>>

NOTHING later than r34311 will install on the 160NL that has  ->Oops: flash id 0xc22017 . 

r4009                      >>>
7.7 MB (7,734,272 bytes)   >>>                                
                             
r40134                     >>>                                
7.7 MB (7,734,272 bytes)   >>>   >>>  these builds will install only on router with  <<<<  ->Oops: flash id 0x1c2017 . 
                                                           
r40260                     >>>  
7.8 MB (7,799,808 bytes)   >>> 


AFAIK the E2100L is same way. I only have two E2100L and both have ->Oops: flash id 0xc22017 . 
so I can't install nothing later than r34311 on them. 

Also the E2100L & 160NL are same but E2100L has 64MB RAM and 160NL has 32MB RAM (both are only 8MB flash)