I have rally wheels on my 68 RS 327/210 hp camaro vert with an 01C build date, the wheels are coded K-1-4 7 XN. Is it possible these are original?

I am about to purchase a set of steel rims & hubcaps for a 68 with a similar build date. Never checked my rims

Thanks

I pulled off the other two wheels and they are coded XG and I cannot make out the date code and since I have power front drums, it looks like I will be selling my non original rally rims