Serial numbers alone can be difficult on Howatts (as well as Bears and others), so pics of the bow and labels are needed by the experts, even Larry Hatfield. Martin took over Howatt in 1976 and believe this bow came along after that.
They made some great shooting bows, but unfortunately, I do not put this bow in that category. I had one a few years ago and it kicked like a mule. I believe folks with short draws shooting lighter weight bows would enjoy it more.