Not quite so easy. Your HIN is DBB”abcdefghi” where the small letters are digits. The DBB stands for Dickerson Boatbuilders. The first two digits “ab” are 00. The next three digits were assigned by Dickerson and are sequential but not necessarily the production number in the class. (For example, the three numbers for my D37 are 305 even though it was the 22nd of 38 D37s built. But as I said, the number is sequential, so the boat built just before it is 304). The number for the sail (hull number) is 22. With lots of inconstancies, these three numbers reflect the build sequence numbers across the whole production output. (So at least theoretically, D37’s have the highest numbers since that were the last produced, but then during some years, Dickerson produced D36’s and D41’s at the same time. Throw in some Farr designed boats and you can see that there is lots of room for exceptions to these general guidelines. The last four digits “fghi” are the month and year produced (0283=February 1983). As a 1973 boat, you are somewhere in the range of 17th to 27th D36 produced. When we plug your HIN and other info into the database, we’ll know more.