Turkish Caliphate ID

Looking for an ID on these. I'm not sure about the Scotts number.

The right one looks to be Turkey Sc. #10, do not know about the one on the left.

The stamp on the left should be in the Turkey Postage Due section. Does it perf 13.5? Looks like it might. If so, I'd guess Scott J19, which also has a printed-on-both-sides variety for a modest premium.

If someone wants to double check this, that would be great. I'm not too comfortable giving an i.d. on these issues.

[edit: I should include '1869' for our friends who don't live in Scott-land.]

I think you are correct Cjd. The 1869 5pi bister brown with red brown border.

That would make it J24, right?

I was looking at a 2006 Classic yesterday, and there wasn't both a yellow-brown set and a brown set listed under the perf 13.5.

Scott must have changed its Turkey listings after 2006 and before 2008, which is the first place I find two options for the perf 13.5 issues. I don't have anything from 2007.

Unless I'm losing my mind. I'll check again in my 2006, but I agree that in the newer catalogues it looks more like J24.