Great Thanks Gerhard !!
This is more than wished, as several other flats (like hunting, tournament knights, ...) are also explained and useful.
I can also notice that Maier has also a name "SIMA", which appears also on some bases of flats, for exemple from Cortez serie and that I could not trace.
I shall check if they belong on Loy serie, or to another list.
I have now many flats on Cortez from four sources: Loy-Maier (Ms, or M- or Lu- or BW-;) Gottstein- as (CO) yy and Kieler (Ba-, Bh-, Bs-, ) and Stoll (HH-).
Not all of them, but I could consolidate the whole based on drawing page is available, pictures of the flats, leaving blanks for missing pieces, to develop a complete collection set, and asking you help to comple with pictures of missing flats (recto and verso), which might take one year ....
I would still need to find the editor documentation of Stoll and lists, decriptive of the flats, then get helps of members for grey army stocks painted or not. (along with indications of the base , both side).
As first reply, send me yr name or response telling whether you have indeed such flats in your armies or collection. I shall publish later on what I have and complete lists as work starts......
Thank you for support
Michel / Hannibal