[Help need to identify age, engine size etc...]

It starts with 560- 

and so according to this it is a 76 - 250 http://ossa.2y.net/ossa/reference/ossaref.html

[Help need to identify age, engine size etc...]

I purchased a similar bike from italy - and was told the following info in spanish:

Hola, de ese modelo se hicieron en dos cilindradas de 230 y 250 cc son exactamente iguales, se hicieron básicamente para exportación y casi todas fueron a Italia, no hay cifras de fabricación, pero no creo que se hicieran mas de 200.

 

For me the bottomline a limited run of 250s have been made late in the run for Italy for Tax or whatever reasons.

And I have full road docuemtents that say it is a 76 with 250CC.