I’ve had a few contacts with Kaliningrad stations, but none ever confirmed before today.  The contact was made with RW2F during the ARRL DX SSB contest the beginning of March and within a week or so of the contest I sent a QSL card and $2 out direct to the Germany address listed on QRZ.com which happens to be DK4VW.  Today in the mail the return QSL card arrived and I now have Kaliningrad confirmed.

Thanks for the quick turnaround Ulrich!

73,
K2DSL