Another old time pattern picture:

I found a picture from an old Swedish RC model catalog and on the front it had this picture.

Tsugutaka Yoshioka, Japan, and his Blue Angel, F3A World champion 1973 (second place Wolfgang Matt - notice his signature on the Blue Angel wing).

[Edit: same picture as below was in Model Airplane News 1974 issue 2 and photo was taken from the roof of MK factory in Osaka. The engine was Enya 60 with YS carburator.]

/Bo