Russian criminal tattoo

I think this tattoo was done in a tattoo parlor. The skull looks like a tattoo from the cover of Baldaev's book Russian Criminal Tatt...

ИК - 9 is number of prison.

Danzig Sergeyevich Baldaev – (1925-2005) - a St. Petersburg police officer, a collector of prison tattoos and priso...

I think this is tattoo made on knee.