A7 Star Twin Rocker Box 1950/1952

[Eduleite]

Hello everybody,
Could anyone tell me if this rocker box is actually the  Star Twin?
Numbering, ZA7S4727 is 1950, right?
It seems to be the Triumph ...
Hugs,

[duTch]

 Longstroke engines have separate rocker boxes with screw in caps like that, but that's about as much as I know....best let those who know....what does the rest of the head look like...??

[Eduleite]

One more pic.
And other engine.
Number AA7S1284.

[duTch]

 The top photo looks to my limited knowledge to be a Longstroke A7 ('46?-'50?), bottom photo later Shortstroke model('49->), and if that's the enigine# for it, then A7...I believe as per recent discussion, that the 'S' after 'A7' denotes Star Twin in both cases, as there was Long and Short stroke versions of the ST.

 Triumph had external pushrod tubes, so don't think there's one of them...

[Tomcat]

G'day Eduleite, DuTuch got it in one. photo 1,2 and 3,long stroke XA7, YA7 and ZA7. Photo 4 & 5 short stroke AA7 or ZA10. And 'S' in the frame numbers means SPRING frame, 'R' rigid and just numbers is also rigid. Cheers TC

[kiwipom]

Hi guys good looking mechanics tool kit there,cheers

[duTch]

 ..hope that doesn't mean I know more than I thought..could be a dangerous thang...

 

And 'S' in the frame numbers means SPRING frame

that's the frame-frame, not the engine-frame..... ..but best we'll leave that alone...

[Eduleite]

Thank you guys!
Besides my perfectionism, I believe that had many variations and in my country, the difficulty of finding parts for all these years ended up creating a lot of changes. I would like to rebuild a as original as possible.