I have 3 S+'s owned them for 10+ years, never hit the top award.
As a forum moderator I will now have to ask you to leave. (kidding)
Nice hit - Nice Looking machine - Welcome to the community.
This is not a common machine - it is likely a clone of another machine.
If you don't mind the ask - on our home page there is Ricks FAQ's please follow the instructions to identify your Reel and Game chips and post them.
We can then figure out the game percentage payback for you and let you know what theme it mimics, from there some one can send you the PSR and PAR sheet for your unit.
The PSR is Program Summary Report and it outlines all of the various option settings, while the PAR is Paytable and Reel and it will tell you payback percentages, hit frequency etc.
There is also the IGT game bible in the Ricks's section which is a listing of the themes available for the S+