I have a set of wheels (8x15 & 9x15) that I'm struggling to read the date codes on. One appears to say 371, but it appears the it has 2 three's almost stamped over one another. Can anyone hazard a guess as to what I've got here?

The wheels came off a 72 that was immediately converted to an ST clone in late 71 (with factory ST Flares, 2.55 liter engine etc), so it would make sense if the wheels were dated 371. Another appears to be 671, but why would the dates be different if they were all purchased and installed at the same time in late 71?

Appreciate any insight from those "in the know"

Name:  IMG_2431-1.jpg
Views: 252
Size:  82.0 KBName:  IMG_2659.jpg
Views: 272
Size:  64.3 KBName:  IMG_2434.jpg
Views: 269
Size:  69.8 KBName:  IMG_2440.jpg
Views: 278
Size:  128.2 KBName:  IMG_2433.jpg
Views: 283
Size:  123.8 KBName:  IMG_2432.jpg
Views: 243
Size:  85.4 KBName:  IMG_2439.jpg
Views: 251
Size:  215.7 KB