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Hull ID Numbers

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Here's how to read the Hull Identification Number (HIN) on your Dynafoil 

An actual Dynafoil HIN number

Hull Identification Number Location: 
 
Like all other boats built in the USA and Canada after November 1, 1972, the Dynafoil's Hull Identification Number (HIN) is indented directly into the fiberglass gell coat on the upper starboard rear corner of the transom and just under the gunwhale where the top half of the stern hull deck meets the transom. 
 
In other words.....upper right rear corner, just under that lip in the body!
 
Reading The Hull Identification Number:
 
The the hull numbers were written two different ways
 
1974-1975 Dynafoils:
 
The early models had a HID number that read like these:
 
DYN041550775-96
DYN040820775-106
 
These are actual numbers from two early models and any help fully decoding them would be greatly appreciated.
 
What I do know so far is that:
DYN  =  The Manufacturer's ID Code (MIC), Dynafoil, Inc. 
 
04= At this time, I don't know what this number stands for.
 
155= At this time, I don't know what this number stands for.
 
07= The 7th month of the year of production, July
 
75= Year of production, 1975
 
96= The boat's production number.  In other words, this was the 96th Dynafoil they built.
 
 
1976-1980 Dynafoils:
 
The later models had a HID number that is in keeping with HID's of the time, and therefore much easier to read.  These HID's look like this:
 
DYN003080377
 
DYN  =  The Manufacturer's ID Code (MIC), Dynafoil, Inc. 
 
00308= The boat's production number.  In other words, this was the 308th Dynafoil ever built.
 
03= The Month of production, in this case March.
 
77= The Year of production, in this case 1977. 
 
This is an actual number from a later model.  Below are two more HID's from later models and with these, we can see a pattern that helps in confirming the decoding of the numbers.
 
DYN003480977
 
DYN003980478
 
This indicates that:
  • Dynafoil #308 was built in March of 1977
  • Dynafoil #348 was built in September of 1977
  • Dynafoil #398 was built in April 1978

It appears that between March of 1977 and April 1978, Dynafoil, Inc. built 90 watercraft.  So, 90 boats in 13 months.  Consider that there are about 20 work days per month, 20 x 13 = 260 work days.  90 boats divided by 260 work days means it took about 2.9 days to build each boat by hand.  That time wouldn't include the time it took the spa manufacturer to make the fiberglass hull, or for the various machining/milling/molding tasks to be done to fabricate all the front and rear strut components.  For example, all the cast aluminum fins, and the front strut which is actually hardwood with a laminated fiberglass outer covering much like a surfboard. 

Bearing this in mind, it's probably not much of a stretch to think that each boat took 1 week's worth of labor.

The Remaining Dynafoils:
 
If you'd like to share your HID # that would really help make this information more accurate.  The table below will list them all so we can see the number sequences and discover not only how many Dynafoils were made, but ultimately how many are left and where they are located!

 
Hull ID Number

 
Production Number/
Color

 
Production Date
 
Owner/Location
DYN084-507750

84 / Yellow

July 1975
Don & Mary Miller/Hysperia, CA
DYN041550775-96

96 / Yellow

July 1975
Andy Mattlock/Oldtowne, ID
DYN040820775-106

106 / Yellow

July 1975
Frank McGuinness/Lawrence, KS
DYN011110775-108

108 / Yellow

July 1975
Mike Le Gate/Newman, CA
DYN001310176

131 / Yellow

January 1976
Jack Holtwick, southern California
DYN001450x76

145 / Yellow

unknown in 1976
Mark McCoy,  Tarpon Springs, FL
DYN001550276

155 / Yellow

February 1976
somewhere in Michigan
DYN001660276

166 / Yellow

February 1976
Sean Nutter / Miami, FL
DYN001740276

174 / Yellow

February 1976
Mark McCoy, Tarpon Springs, FL
DYN002190476

219 / Yellow

April 1976
Jack Holtwick , southern California
DYN002210576

221 / Orange

May 1976
Josh Jensen, Cincinatti, Ohio
DYN002250576

225 / Yellow

May 1976
Peter Normington, Co. Wicklow, Ireland
DYN002380776
238 / Yellow
July 1976
De Anna Smith , Choctaw, Oklahoma
DYN002470676
247 / Yellow
June 1976
Jack Holtwick, southern California
DYN002610776

261 / Yellow

July 1976
Tommy/Tamp, FL
DYN002660876

266

July 1976
Scott Smith/Miami, FL
DYN002740776

274 / Yellow

July 1976
Fred Chattey/Greenbrae, CA
DYN002780776

278 / Orange

July 1976
Bob Meyer/Arlington, SD
DYN003060377

306

March 1977
Scott Smith/Miami, FL
DYN003080377

308 / Yellow

March 1977
Todd Miller/San Luis Obispo, CA
DYN003120377

312 / Yellow

March 1977
Tim Adler/Kingston, TN
DYN003180477

318 / Yellow

April 1977
Josh Jenson / Cincinnati, OH
DYN003290677

329 / Orange

June 1977
Fred Chattey/Greenbrae, CA
DYN003400877

340 / Orange

August 1977
Todd Miller / San Luis Obispo, CA
DYN003410877

341 / Orange

August 1977
Tommy Sciortino/Tampa, FL
DYN003480977

348 / Yellow

September 1977
Tori Miller/Grover Beach, CA
DYN003620178

362 / Yellow

November 1978
Jack Holtwick / southern CA
DYN003640178

364 / Orange

January 1978
Tony S. / Australia
(one of 4 Jim Emmett imported in 1978)
DYN003660178

366 / Unknown color

January 1978
Tony S./Australia
(one of 4 Jim Emmett imported in 1978)
DYN003700278

370 / Orange

February 1978
Tony S. / Australia
(one of 4 Jim Emmett imported in 1978)
DYN003790378

379 / Yellow

March 1978
Joe Kearney/Sacramento, CA
DYN003800378

380 / Yellow

March 1978
Josh Jensen/Cincinatti, OH
DYN003860378

386 / Yellow

March 1978
Bill/TX

DYN003980478

398 / Yellow

April 1978

Russell Autry/Harriet, AR

DYN00400478

400

April 1978

"BJ" Meinhardt/St. Louis, MO

DYN004010478

401

April 1978

"BJ" Meinhardt/St. Louis, MO

DYN004240578

424/Yellow

May 1978

Mike Lee / Aguanga, California

DYN004910679

491 / Yellow

June 1979

Diane Bell/Somewhere in CA

DYN004920679

492 / Yellow

June 1979

Russell Autry/Harriet, AR

DYN004930679

493 / Yellow

June 1979

Al Hayes/Paradise Lake, TN

DYN005041279

504 / Yellow

December 1979

Bill/TX

DYN005260780

526 / Yellow

July 1980

Celi Carnicer/Corrientes, Argentina 

DYN005270880

527 / Yellow

August 1980

Scott Smith/Miami, FL