Machines of Class 71, for power operation, were brought out in 1904 and are the latest evolution for making straight button holes without eyelets, either purl-stitch or whip-stitch.

They are especially designed for work on Cotton and Linen Fabrics and Knit Goods; they excel all other machines, not only in the quantity of work produced, but also in the neatness of the finish and the facility with which adjustments can be made.‘While truly automatic, they are simple and effective, not liable to get out of order, and are easily handled by all operators.