[TR] TR4 Dwell Angle

[Brian.L.Jones at gsk.com]

Setting the breaker points' gap accurately is a little tricky, especially 
for not-new contacts that exhibit pitting / build up. I have read that 
correcting dwell angle is more accurate than setting points oin this way.

What would be the correct dwell angle for a TR4? 

While I have found multiple references for a TR6 at 35 degrees (+/- 3 
degrees). I found one reference to TR4, at 60 degrees(+/- 3 degrees) on a 
website I have no reason to trust.

Could someone please confirm?

Many thanks,

Brian