Sometimes I think my brain is square, I stand corrected, Thankyou...... <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jim_Cannon</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: juliano</div><div class="ubbcode-body">All Canadian model a used philips for interior screws.<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jim_Cannon</div><div class="ubbcode-body">Here's one: We all know that there were no Phillips head screws on an original Model A. Anyone know why? </div></div> </div></div> The Canadian cars used a square drive screw called Robertson drive. See: http://en.wikipedia.org/wiki/Robertson_screwdriver They can not have used Phillips screws because they had not yet been invented in 1928-1931. </div></div>