Until recently, I thought they were all retired from the army at the time of 1939. Then I found this post of the Polish site.
There's a mention that these tankettes were remained and used for training duties until September Campaign.
Wszystkie tankietki dotrwały do września przerzucane jako sprzęt ćwiczebny z jednego batalionu do drugiego. Pisze o tym Michał Kuchciak autor artykułu z którego pochodzą dwa wcześniej wstawione przez bodzia000000 zdjęcia.
But I've couldn't find any references or documents which confirm this. Anybody know about these vehicles' fate between 1929-1939?
Also, can somebody tell me when & where this photo was taken?
(photo from: http://odkrywca.pl/forum_pics/picsforum24/carden.jpg)
-> The vehicle's number '1152' is clearly visible, and it seems that the tankette have original VCL suspension, not the Polish modified version. And looks like the soldiers in this photo are from 10th Cavalry Brigade as they wear uniforms & helmets similar to 10.BK's, but it is only my guess since I have no idea when this photo was taken.
(PS: there's more photos of Polish Carden-Loyds in links below)
Link 1: http://odkrywca.pl/tankietka-carden-loyd,125291.html
Link 2: http://odkrywca.pl/pokaz_watek.php?id=329677#329677
Link 3: http://odkrywca.pl/pokaz_watek.php?id=386373#386373