the change in the bezel (additional WIPER & HEADLIGHT symbols) was for model year 1974

from the Parts Catalogs:
8-37-90 BEZEL, speedometer & instrument cluster
Plymouth & Dodge B-bodies (RW)
rallye:
w/radio
2985 158 (1971-'73) & 3592 686 (1974)
w/o radio
2985 157 (1971-'73) & 3592 685 (1974)