Help with manufacture dates on a few machines

[alphaminor]

I think member Alphaminor has a Sankyo Casino 2, it's listed over in the Modern Pachinko Database thread, but no date is showing,

I was never able to confirm the specific year (didn't really try too hard at the time)
but my Fever Girl machine is in the same frame and was released in 1993,

also got a few machines in, what I'm fairly certain are, Sankyo's previous frame style that date around the end of the 80's,(Rolling Machine,Broadway,etc...)
so I'm thinking Casino 2 is a very early 90's release (early to mid 90's with Tako Yaki,which I love and want BTW )

Bet Candyflip would know a lot more about the release dates of these Stellar 2000 frames