Identify me some magazines?

Friend gave me a bunch of M9 magazines, and these were mixed in. I suspect they are for the M11, a Sig P228, but would like a second opionion. They are 13-RD and appear to be 9mm (see pic) marked with Sig Sauer inlaid on the left side.

If this isnt the proper section or not appropriate please delete, thanks.

They appear to match this auction on GunBroker - Auction

All of the rest of the stock P228 magazines have a blued coating, these appear to have some kind of soft-powder coating to them.

M11/P228 mags.

Thank you sir!

Do they have any markings on them?

Other than the “SigSauer” no.

Phosphated Sig P228 magazines, likely made by JP Sauer.

The magazines in question are without a doubt for the P228\M11 in 9mm. Sig made magzines will have a small circular stamp with three ‘S’ in the circle like spokes on a wheel. Mec-Gar made magazines don’t have this stamp. Either way they are excelent magazines, and pre ban as well for those states that still have an AWB.

I did not even notice the tiny S logo, it does indeed have a circular Sig logo. How are you able to say for sure these are preban?