[SEL] Hercules help

[Germoamer at aol.com]

I have been contacted to come and look at a 6(?) hp Hercules/Economy/Sparta 
engine and to price it for sale.  It has been described as an ignitor engine 
with battery and coil, no mag. The owner also stated that there is no known 
serial number tag on the top like most Economy/Hercules engines.  So, from my 
limited knowledge and his descriptions I assume it may be a very early Hercules or 
maybe a Sparta engine, but just guessing at this time.  Is there some where 
to look for a serial number or casting date on these early engines?  Also, what 
distinguishing features should I look for to determine if Sparta versus 
Hercules?

Thanks,  

Tom Schmutz
Concord, Va. USA
Germoamer at aol.com