Thank you Michael for your kind help. I also have photos of the 3 Ki-61-II's in Kagero's excellent Ki-61/Ki-100 book. The razor back with the Japanese kanji character for thunderbolt is a post war captured Ki 61-II with fictional markings applied for display at Paterson air base in Dayton, Ohio. So far I only found photos of 2 original operational Japanese Ki-61-II (razorback #17 and the bubble top from 56th Sentai which is surprisingly dissapointing considering recent references state about 99 Ki-61-II were completed).
Recently read a fascinating article by Don Marsh and James Long at j-aircraft about the sole surviving Ki 61-II "5017" marked #17 at Fussa test center. The article mentioned a second Ki-61-II razorback version marked #10 for 5010 from a full-profile photograph. Although #17 is well documented and photos easily found in references, I can not find the photo of #10. Would appreciate any reference source for a photo of Ki 61-II marked #10. Fine Molds and RS have #10 on their respective decal sheets. The first edition of RS 1/72 Ki-61-II razorback version also features #30 at Fussa, but I can not find any references that mention or document aircraft #30. Marsh and Long said only #17 and #10 are known to exist at Fussa. Is #30 an urban myth?
Luftwaffe Im Focus #3, page 37 shows the tail of Lt. Udo Cortes's Ju88 C-6, werk-nr. 360379. The caption states 5K+RT. Unfortunately the fuselage side codes are not visible in the photo. Don't know how the authors derived the fuselage code. Usually a clear photo of the fuselage code, eye-witness testimony, records, etc. would help, but I am not aware of any of these for Cortes's Ju 88 C-6, werk-nr. 360379.