G30 Sleeve Valve Engines

[Ronster]

Hi All Looking for some help.
I have attached an image of 2 engines.
The invoice for them states that they are both G30 Sleeve valve engines and the serial numbers on the invoice match the engines.
I've not got any idea the cc.
Invoice date is 1992 but these engines have never been used and both are greased and with good compression.
If any one can advise as I might be wanting to sell them on

 

[tornitore45]

G30 from Italy then they should be Supertigre. G stand for Garofali the Owner.

I had a G30 in the early 1960 and was not even close to the ones you show.
The G30 is a 2.5cc Diesel with a red head and rear sleeve valve.

Unless Supertigre reuses engines names (unlikely) you got something else.

 

[Ronster]

I also have a letter confirming the order dated 1990.
I don't think these are the Supertigre as gentleman in the UK made these and marketed them himself. as well as the G60.
He also refers to a company name.. Complete-a-Pac co.