Hamill model number 1902 is for a 1969 Chevelle front center position and a 69 chevelle wagon 3rd seat position.
Model 1952 was shoulder belts and was used on both Camaro and Chevelle, although the lengths are slightly different.
Model 1914 was used on Camaro early rear laps and early Chevelle Fronts.
No small (RCF67) buckles were used on 69 camaros, but were used on Chevelles. Chevelle Blue webbing color is slightly
darker than Camaro webbing, as it appears in your photo. Based on that information I would say you have a set of belts
from an early 69 Chevelle.