Help With Mexico Watermarks Aztec Bird Stamps

Good evening from TX.

Working on my MX Album and am having some trouble with these Airmails. This is what I believe I see:

First stamp WM = 156 correos Mexico so C70 Blue. The second one, I think I see WM 279 and therefore the stamp is C174 Blue gray. EDIT: Could also be WM 272 and the stamp could be C137. What do you think? I am also showing the front as well so you can see the color.

Thanks.




Edit - my bad, should have placed this in World BOB.

*** Moved by Staff to a more appropriate forum. ***

The right stamp is watermark 279 (nicknamed "Gobierno"), C174. I believe I see the small eagle emblem at about the 8 o'clock position. I don't see the watermark "ruling lines" here, but they can be quite strong to near invisible.

Watermark 272 (nicknamed "S.H.C.P.") has taller rectangular Cs and Os.

Hi hy-brasil, thank you so much. Many of these can be tricky for me. For example I am struggling with Eagle Man (Scott AP18) I have quite a few and there are several iterations in terms of perfs, watermarks and color. I am proud of myself for using the Ronsonol on some mint NH stamps - as all said, everything is fine :)

Yarg, the Eagle Man might be the most wrongly identified stamp by watermark around!

Me, I've saved up those definitives and done the identification together to be able to do watermark comparisons.