U R welcome PEB

And still am searching for more use of this roundel. I guess this is the only time it was on an aircraft.

[ATTACH=JSON]{“data-align”:”none”,”data-size”:”full”,”data-attachmentid”:3874310}[/ATTACH][ATTACH=JSON]{“data-align”:”none”,”data-size”:”full”,”data-attachmentid”:3874311}[/ATTACH]

India: Defence Research Development Organization

[ATTACH=JSON]{“data-align”:”none”,”data-size”:”full”,”data-attachmentid”:3874305}[/ATTACH]

[ATTACH=JSON]{“alt”:”Click image for larger version Name:timage_258379[1].png Views:t0 Size:t26.8 KB ID:t3874274″,”data-align”:”none”,”data-attachmentid”:”3874274″,”data-size”:”full”}[/ATTACH][ATTACH=JSON]{“alt”:”Click image for larger version Name:timage_258380.jpg Views:t0 Size:t170.4 KB ID:t3874275″,”data-align”:”none”,”data-attachmentid”:”3874275″,”data-size”:”full”}[/ATTACH]

the picture in your post is the only one I know

Very interesting PEB. Thanks!

In your initial post you depicted them as F-15, I agree they are F-4.

Do you know when the picture was taken?

still true. That roundel was only known on the very early F-15s. The ones on the Netherlands based F-4s were ca. 1974? Just before the F-4 were replaced with the F-15.
[ATTACH=JSON]{“data-align”:”none”,”data-size”:”full”,”data-attachmentid”:3873228}[/ATTACH]

[ATTACH=JSON]{“data-align”:”none”,”data-size”:”full”,”data-attachmentid”:3873229}[/ATTACH]

But in the meantime I also found this one

[ATTACH=JSON]{“data-align”:”none”,”data-size”:”full”,”data-attachmentid”:3873230}[/ATTACH]
Grumman Widgeon