Mack Tradesman Lace Up Safety Boot Color:Black I am not sure what

I am not sure what SPS stands for

Size: 8" H x 4 1/2" W x 2" D

Date: 1981

while the reverse showed the denomination flanked by two ears of wheat

Mack Tradesman Lace Up Safety Boot Color:Black I am not sure whatMack Tradesman Lace Up Safety Boots (MKOTRADESBBF) Engineered specifically for trade professionals, the Tradesman boots offer all day comfort and support. Featuring a lace up design, these safety boots deliver enhanced ankle stability at an excellent value, perfect for apprentices and part time workers. The TPU outsole offers superior resistance to hydrolysis, microbial degradation, oils, acids, and organic fats when compared to traditional dual