Our thanks to our customer Paul Dutram who did some research. Paul says:

"I did some research on this model looking at historical production dates for the 1:1 real models (for those of us who obsess about such things):

"The C-900 was produced from 1957-1990, however there were some changes that apply to this AMT model in particular.

Between 1958-1960 the real truck used quad headlights (not this model) and reverted to single headlights in 1961.

This model has the side marker lights federally-mandated from 1968.

The small cog-and-lightning-bolt logo-crest on the middle-front of this model was used from 1957-1974.

So this model is accurate as is for 1968-1974. (of course experienced modelers can sand off these marker lights to backdate it to 1961 (single headlights); and remove the front logo-crest to update it through 1983 after which the Ford blue logo was introduced).

"The GarWood LP-900 Load-Packer refuse body was introduced in 1972.

So the model, as is, is accurate for only 1972-1974.

The previously-issued other Ford C-900 models could be accurate for 1968-1974 as is, but I have no knowledge of the semi-trailer and auto transport trailer issued in some kits."

We thank Paul for passing this on.