Hi, guys.
I tend to agree with Jim P. and John Manrho on this.
If I should make a qualified guess on the unit, it would be one of the Sturm units, and in my opinion the best candidate would be II.(Sturm)/JG 4.
I have losses listed for FW 190A-8's 682656, 682657 and 682659, all with II.(Sturm)/JG 4, and although we all know that a mix and match with regards to WNr-series and unit deliveries occur all the time, it seems that the late war stream of aircraft to units were more 'block' orientated than earlier in the war.
Loss records:
http://www.ahs.no/ref_db/lw_loss_pub...?lossid=127526
http://www.ahs.no/ref_db/lw_loss_pub...?lossid=103293
http://www.ahs.no/ref_db/lw_loss_pub...?lossid=103694
Regards,
Andreas B