Vintage Oil Filter Cartridge - Walker RC 67

I found a box of vintage oil filter cartridges today. All in their original boxes. I am trying to place a date on them and also a model of vehicle or motor they might have fit. I emailed walker directly but the person on the other end had no idea and that they deal with exhaust. This is true except that walker used to deal in other things as well back in their day. The writing on the box makes me think 40's-50's. Included in the pictures is the original patent dated 1947 and submitted in 1945. Any help would be appreciated as I am sure these would be sought after by the right person. Thanks!