Underwood Magazine Question

It's been a looooooong time since I posted anything here, but thought I would ask your opinion on a current E-Bay auction. I'm in the market for an Underwood-marked magazine. I have a gajillion IS mags already, but would like one IU to go with my '43-B Code.

It looks "okay" to me, but I know very little about magazines, so thought I'd ask for opinions:

M1 Carbine Magazine USGI, marked "IU" w/ Circle, 10rd | eBay

Thank you all in advance.

As an aside, I am in the market for a IU-marked oiler, too--my carbine had a length of dowel instead................

IU in a circle on a magazine was also used by Inland and being that it's a later magazine it's one made for Inland. You would need a type one magazine with a flat base marked IU in a circle for Underwood as it would be correct for an early Underwood carbine. LU and UU are also Underwood magazines.

Thank you!!!!