The other month I purchased a lot of nail knobs and fence insulators and there was several of these German made spools in their. The larger ones are marked M.B. Co. 87 3/8 Germany. and measure 1 1/4" W X 3/4" H. The smaller one is marked M.B.Co. 479 B Germany. and measure 1"W X 3/4" H. If anyone knows who this company is or a website link I'd greatly appreciate any info I can get on these guys.