Singer Sewing Machine No. 31-15 User Instructions

Complete user manual for the Singer Sewing Machine Model No. 31-15 with oscillating shuttle mechanism. This January 1916 instruction booklet provides comprehensive guidance for operating the lock stitch sewing machine designed for stitching clothing, cloaks, suits, skirts, and shirts. The manual covers essential topics including machine specifications with a maximum speed of 2200 stitches per minute, proper needle selection and sizing for various fabric types from delicate silks to heavy woolens, and detailed threading instructions for both the bobbin case and needle. Instructions detail how to remove and wind the bobbin, proper thread twist determination, and operation guidelines to ensure perfect machine action. The document emphasizes the importance of using Singer brand machine oil for optimal performance and maintenance. Specific needle classifications are provided with corresponding thread weights and fabric recommendations, ensuring users select appropriate supplies for their projects. The manual includes practical sections on purchasing replacement parts and needles through Singer retail outlets or by mail order.