"Zeros" in Production Numbers?

[ChevroletWT]

Hey all,

I was curious about 55-59 truck VIN numbers. Did the factory ever put a zero IN FRONT of the production number, say if it was a low production, five digit production number, in order to keep a 6 digit format? Here's an example:

If a 1956 stepside built in St. Louis was the 26,356th truck to come of the line, would the VIN be

3A56S026356

OR

3A56S26356

If anyone has a 55-59 truck that has a zero (or zeros) at the front of the production number, then that answers my question. Thanks!