Similarly, if this monster?

[Алек Сандер]

Please help determine authorship. By all signs Zverev. The painting is owned for 10 years. We bought a hand nezadorogo, from a friend, go abroad. Material - paper (butcher?), Who looked very, very old. Confused date - like 78, but seven did not like. And the technique more typical of mid to late sixties, so maybe the 68th, but I've never seen that so Anatoly T. wrote number 6.

Should I apply for examination to Silaev?

PS Sorry for the quality of the photo. Non-specialist.