so they (pentax fabrique) have all the data from camera which produced in KW 49, and they will change this camera direct eventhough perhaps take little bit longer time .
and how we can determined , which Pentax k-5 produced in KW 49 its not going to publish here. because it came from their database. in germany they dont open it for free...
i think pentax will just announced the series number of the camera. the range series number from pentax K-5 which produced in KW 49 ..
( just the range number not specific ) and just give it to dealer.... not for public IMHO ....