I suggest that you verify "your" information more carefully before making your "I Spy" observations. Many like you seem to have a lot to learn about Buicks. The only cars that had a pedal that said (Power Brakes) were cars that had Power Brakes; a Treadlevac system that was complicated. Many 1954 to 1956 Buicks were produced without them and had a (plain Brake pedal). I also own another 55 Century Tourback sedan that has a plain brake pedal. Additionally, you missed another difference in the photos; it has a 1954 radiator. There are a few more differences if you choose to look carefully.