Neptune Model A A4 5hp

[NeptuneAA4]

I saw a Neptune Model A A4 5hp for sale. The serial number is P11188A. Can someone tell me the year of manufacture, and anything else about it. Also, where could I buy a return spring for it.
Seeemilyplay91@aol.com
Thanks!

 

[F_R]

AA4 was built 1948 through 1951. Go to www.aomci.org and place a free want ad on their classified ads forum.

 

[NeptuneAA4]

Thank you