Hello,
My DS-2CD2432F-IW bought from Wrightwood came with:
Firmware Version V5.1.0 build 131202
Encoding Version V5.0 build 131128
It's Serial No. DS-2CD2432F-IW20140901CCCH478xxxxxx
The sticker on the back says:
09/2014
V5.2.0_140721
I'm guessing it's a Chinese cam but the GUI is...