Model A

Ford Garage

Key & Code Identification Chart

Ignition & Door Locks

Click image for a larger view!

The table below shows the typical original and replacement Model A Ford door and ignition lock key blanks and their usages, as well as charts of the key numbers and their corresponding 5-bit cut codes.

28-30 Ignition
(Oval Speedo)
Ferro
Door & Deck
28-31
Ferro
Door & Deck
Round Head
28-31
Ferro
Door & Deck
Round Head
30-31 Ignition
(Round Speedo)
Ferro
Door & Deck
30-31
Crown
Door & Deck
Original
Key Blank
(click image)
Original
Key Groove
B&S
Groove 1
B&S
Groove 1
B&S
Groove 3
B&S
Groove 5
Crown
Key Number
Range
A801
A1050
11111A
33333A
Digit Series
A1051
A1300
A1301
A1550
F 551
F 800
Cut Code Chart
(click image)
Replacement
Key Blank
Bold lettering indicates preferred replacement key blank numbers
Red lettering indicates poor fitting alternate choices
Briggs & Stratton
BASCO
Strattec
Groove 1
42107

Groove 14
75102
Groove 1
42107

Groove 14
75102
Groove 3
42164

42277
320734
Groove 14
75102
Groove 5
62849
Ilco
Kaba
1098X
1098M
C1098M
1098X
1098M
C1098M
1098DB
C1098M
1098M
C1098A
C1098M
1121C
Taylor/Dominion 98X
98M
98X
98M
98DB
98M
C98A
Curtis/Cole B4
B52
B1
B4
B52
B1
B5
B1
B1 too tight

Modern key blank numbers are shown in order of decreasing suitability for proper cylinder fit (within a brand). Bold lettering indicates the preferred replacement key blanks having the correct groove profiles.

Shown above are a pair of original Oakes Tire Lock keys with the special shaped Oakes head, Groove 1 profile blank, and the Ford digit series key number.

At the present time, A&L Parts in Canton, Connecticut makes reproduction key blanks of the original B&S plain head keys for the 1928-30 Groove 1 Ignition & Door, 1928-31 Groove 3 Round Head Door, and the 1930-31 Groove 5 Ignition & Door cylinders.

While the A&L blanks are nice reproductions and fairly close to original in appearance, I prefer to use either NOS B&S blanks, or the modern generic Ilco replacement blanks.

Shown above are a pair of Curtis key clippers that I use. These are clippers, not duplicators. They cut a key to a published code or key number, not by copying another existing key.

The post version on the left is a Model G from about the 1940's, and the dial version on the right is a Model 14 from the 1960's. They are both set up and calibrated for the 5-bit B&S key blanks as used on Model A's.

It is important to calibrate the vertical depth of cut for every key clipper you may buy. It is not enough to trust it in the as-found condition. The key carriages are also dependent on the blanks being used. All Model A keys (other than Crown) use the carriage marked 'BS' with five cut positions. The 'BS' position is also used on the post or dial.

Both of these clippers are universal aftermarket type tools used by garages and hardware stores of the era to cut a variety of key blanks and styles then in use. They both work just fine on brass blanks. Steel key blanks are not recommended.

I also have another Model 14 set up and calibrated for cutting the Hurd key blanks used during the flathead Ford V8 era.


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April 2017