Hi Cirillo,
Well you seemed to have answered your own question, yes your engine is a June the 9th 1969 built unit.
That engine was originally painted silver and was a 2HP unit. I've now realised that your engine cowling is probably the original one belonging to that engine but a previous tenant has decided to paint it redish / orange, why ? that's anyones guess.
These 14 inch machines also sometimes came with a 2.25HP engine in the same silver colour scheme.
Cheers,
BB.