Sorry for keeping you waiting for my response - I have been busy lately - sorry.
Regarding - Methodology - presumably - you asking for methodology I have been using to "categorise / identify - new variants". As mentioned a few times in the posts - it is nothing more than a crude "try and error" approach, that is far away from professional approach applied my archivists / historians etc. It is just an approach of a bunch of enthusiasts - based on trying to a) find 2 identical specimens and b) find some written and / or photographic records to go with a newly "identified" variant to provide for source info. I find step a) relatively easy with help of forum members, but step b) is usually very hard.
Re Mid-East made Eagles - the library of pictures is quite extensive - various regimental books + archives in London (sikorski / pilsudski institutes) + press from that time.
Libraries of pictures are smaller (from my experience) in relation to 1 Core (UK / Scotland) and 1AD and other polish Units in Germany post 45.
Overall - I would say the subject of Polish Free Forces - Eagles is well under-researched - and probably we will never 100% identify many variants re manufacturer / time / unit etc
Regarding - casting technologies - actually, I have made some effort over years to learn a bit and see some processes - but again - I consider myself far form being well acquainted with the subject.
All in all - on both subjects / points above - constructive comments / posts / pictures are invited - so feel free.
Please post - your most interesting / intriguing Eagle - perhaps we can "identify / categorise" it
checking for dents. will take pics on the morrow.
may have presented these before, can't remember
Very good Picture of the Cadets Eagle - I have found it among pictures I did take at the sikorski's institute.
I think - this Eagle is worth posting.
It is a very interesting variation of 40mm - Eagle made by Gaunt of London.
What makes it interesting it its fixing - that is unusual for the "Gaunt - Land Army" (typically - tread, is seen) - this one has the fixing as for the Gaunt made - Navy Eagle.
This is first time I see the fixing of that nature for the "Gaunt- Land Army" Eagle.
This could be an example of short / rare production run - I think.
I have just found an interesting Eagle and perhaps we collectively, again, can conduct the "simplified identification" - by finding the 2nd example.
Please notice some very characteristic features - front and back (specifically).
Perhaps one of you can help - by providing some pictures, clues, sources etc?
I have been trying to learn more about this particular Eagle and, specifically, figure out if this variant can be with no-doubts connected with Polish Free Forces in France 1939 - 40.
One of the hypothesis I have - centres around the fact than a very similar variant is clearly identified in literature (Zawistowski, Eagles 1917 - 19, page 126) as the "NCOs Eagle" made in Paris in 1917/18 for the Polish "Blue Army" (Haller's Army). However the fastening and shape of the crown are slightly different.
Perhaps, like in case of some other Hallers Eagles - the stamps had been re-used in 1939/40 to re-strike Eagles for the Polish Volunteers joining the Army under gen Sikorski.
However, I have not yet come across any pictures / sources - to confirm that.