Mid 1952 - February1953

Upholstery colors in these years had 'Black' upholstery

March 1953 - July 1958

Upholstery colors in these years had 'Black' upholstery.
However, the pebble pattern on the upholstery slightly changed as of march of 55.

August 1958 - August 1961

Mplate started in this year, 58. Body colors are called out by name on the Mplate.

Upholstery colors in these years were 'Grey' upholstery.
"80" will be called out on the M-code plate to reference Grey upholstery.

September 1961 - July 1963

Upholstery colors in these years were 'Grey' upholstery.
"80" will be called out on the M-code plate to reference Grey upholstery.

August 1963 - July 1964

Numbers in (red) are Mcode plate call outs.

Starting this year, Body paint colors were called by number on the Mplate instead of by name. Upholstery colors in these years still had 'Grey' upholstery, now with white piping. (Trying to narrow down the change. If you have what you believe to be original to your truck seats send me an email!)
"80" will be called out on the Mcode plate to reference upholstery color Grey.

August 1964 thru 1967

Numbers in (red) are Mcode plate call outs.

Colors in these years used 'Mesh Grey' upholstery
"83" will be called out on the Mcode plate to reference this color.

**L567 Ivory still used "Grey" which is now refered to as "94" on the Mplate.