Welcome to the Helms board. You have one of the earliest Helms 25 with a 1972 #11. They made some minor changes over the years like moving the cockpit drains to the stern and having a through hull for each instead of a T or Y connection. The changes have been discussed in different threads.
Send some pictures. We like to see what's different on the boats.
I'm glad to see that one more will be saved rather than cut up.
Rehoboth Bay/Indian River, DE
S/Y KJ, Helms 25