Can't say I've ever seen a m1917 with a British formation sign, but I did once see one with a Canadian Broad Arrow stamped inside the liner. 

𝐁𝐀𝐓𝐓𝐋𝐄 𝐎𝐅 𝐀𝐓𝐓𝐔: May 11th - 30th, 1943 Aleutian Islands Campaign, June 1942 - August 1943. Battle for Attu, May 1943. Alaskan scouts stand by on deck of USS Heywood (APA-6) ready to go ashore in landing boats off Attu, Aleutian Islands, May 11, 1943. Left to right: Sergeant T4 B. Moriwaki and Staff Sergeant D. Spaulding. These scouts work with Army Intelligence. Moriwaki is an American-born Japanese and is used as an interpreter. U.S. Navy Photograph, now in the collections of the National Archives.        

. Hi Flibble,   I had a bike very similar to this but we believed it was a built somewhere 1946 -1948 looking at the numbers stamped on it, I had probably had it nearly forty years and never ridden it, just used it as a static exhibit at displays we did back in the day.  About three years ago I gave it to a neighbour in the village that has an interest in assorted militaria with no specific time frame.   I thought I had posted about it when I gave it away but couldn't find it in a search I did on the forum, so no photo of it.    Norman D. Landing, Forum Normandy Correspondent, 18 May  2O26.   ..    

USAF / 611th Aircraft Control & Warning Squadron. Mineokayama Liaison Annex, Shiroi AB, Japan 1952-1960. Japanese-made "Lord Chesterfield".

𝐁𝐀𝐓𝐓𝐋𝐄 𝐎𝐅 𝐀𝐓𝐓𝐔: May 11th - 30th, 1943 Signal Corps radio crew on transport maintaining contact with first wave as it lands on Attu, Aleutians. 11 May, 1943. Presumably 7th Infantry Division. Photographer: 2nd Lt. Ferris F. Copper. (Signal Corps)  

The lot stamp is upside down. Approximately 1–3% of all WWII McCord stamps appear upside down, most commonly in the earlier production ranges, though examples can be found throughout production. I believe this is lot 106E, for sure 1x6.   The loops appear correct, although their attachment to the shell is slightly unusual—possibly due to insufficient amperage, welding time, or both. Lot 106E examples are known to show these characteristics.   The dimples are extremely faint, to the point that they may not be visible from the exterior, though they should still be detectable from the inside. Many shells in the 9x–10x lot range exhibit this feature. A sharper image of the stamp would help, along with photos of the rim interior directly behind the loops to confirm dimples. I’d also like to see the opposite loop from the inside.

Captain C.A. Broddus, MC, USN, of Admiral Rockwell’s staff, dons an Army uniform as he participates in removal of wounded with a ramp boat, during the landing operations at Attu. Photograph, June 14, 1943. Official U.S. Navy photograph, now in the collections of the National Archives.  (National Museum of U.S. Navy    

Saw the other listing with other items belonging to S. J. Peloza. Another one-of-a-kind group broken up.  First day and already above $1500....wow!

nice finds. The AMA badge is one I haven seen (American Motorcycle Association) 

Matt,   Your dedication to finding family connections and lost history is quite impressive and very much appreciated. You go well above and beyond in helping the members here and I am greatful for your dedication and time spent on these research projects.   Well Done..   Best regards   Leigh