Those aren’t the original knobs.
the blue paint: it means nothing except they didn’t use another color. Not a big deal.

As said, the knobs are most likely replacements. I have seen a few V2 Muffs with them, but they were modern Davies Molding replacements.

The Muff itself may be somewhat unique. I have come across several blue V2 Muffs like this, with the flat bottom of the face circle graphic exactly like yours. Each had the exact “violet” spec circuit schematic. The violet schematic is rare because it is one of the brief times EHX seemed to follow an exact schematic for a time. Most V2s have wildly different components values, making them all sound different. The violets sound great, to me anyway, because they are not too bassy, are thick sounding for chords, but not overly grungy/muddy thick, and have a very nice articulate sound for solos. Not overly mids scooped either. They are not as high gain as some of the other Ram’s Heads, but are not overly noisy either.

Not all Muffs with blue ink have the violet circuit, but every one I have seen with that flat bottom circle did. It is one of the more desirable Ram’s Head Muffs.

If you look about halfway down this page, you will see a few with the exact same blue graphics, and pix of the circuit to compare, or shoot some pix and post them and I can tell you if that is what you have.
http://www.kitrae.net/music/big_muff_history1.html#RamsHead

Here is one of mine.