A bit of a clarification: The FORD MOTOR COMPANY did NOT use Robertson screws. It was not standard for the cars built in the U.S, which represented the overwhelming majority of Model A's.
However its FORD CANADA branches DID use Robertson screws. For Canadian-built Ford Model A's, the Robertson screw was standard. So, YES, A-bone, your car is correct in having Robertson screws - presuming that it was built in Canada.
Many of the Canadian-built Model A's were built for several of the over-seas countries of the British Commonwealth. So places like Australia should also have Robertson screws. Many of the Canadian Model A's that were shipped over-seas were chassis only, and had a locally built body, and it those cases may have had other than Robertson screws.
- Doug Vieyra