Help With 2c Washington (#546?)

Hi. Need help with this one. So far I've seen this:
- Perf 11
- 19 x 21.5 mm
- I don't see ink on the back so I assume it's not Flat printed

With this info I've narrowed it down to: 526, 527, 528, 528A, 528B, 546.
Looking at the image, I believe it to be 546. Is my reasoning correct?. Any help it's appreciated.

Caveat: Learner driver myself.
I get that result, so using stampsmarter, how do we establish the types?
Is this where we cut a template for the rotary v offset?

https://stampsmarter.org/features/S...rank_ID.html

This "ink on the back"
Is that true with all, or is it better to test for Wmk always?

PS: I nearly gave up, on my first attempts on W/F
I could not see any Wmks.
Soaking and pressing the used stamps, to make sure they are religiously clean, and the wmks became visible with fluid.
Still tricky.

Definitely one of the offset printed varieties, 526-528B.

It appears to be Type V or Va.

Definitely an offset printing, hence not 546. Agree with revcollector, type V or Va. Hence 527 or 528.

Thank you for all the replies. How do you tell offset from rotary printing?

It looks like it's perf 10. If so that would rule out offset stamps.

Can't be, it has too many offset characteristics. The left numeral, the toga button and ribbon, the lack of strong definition of the portrait and hair.

It's perf 11. I double checked it

One way to distinguish offset printings from rotary (or flat plate) printings is to gently run a fingernail across the design on the face of the stamp. Rotary and flat plate printings are engraved; thus you can feel the engraving lines with your fingernail. Offset printings are not engraved; the stamp surface will feel smooth to the fingernail.

Thanks. I will check it out.

More information here
https://www.stampsmarter.org/learni...methods.html

Don

Definitely perf. 11 and an offset printing, Type, V or Va (both with complete toga line and weak left "2" inner line).