I don't think it is a Jubilee, look at the fuse between the TE and stab. We need someone from that era to chime in
Well, I "think" that was my era! I finally soloed a complete flight that ran the tank dry in 1951, after over a year of trying to run a couple of sparkies I started out on, and never got a full lap out of (never knew what the retarded spark meant as far as operating with normal advance).
I've never quit the hobby, just taken breaks when my education, or child-rearing, or my career, made serious demands on my spare time. And I only vaguely recall any model(s) with fillets/gussets like that one has on it.