Cylinder-bed, top and bottom coverstitch machineMF-7900/7900D series: H22 (Hemming, for light-weight)MF-7900/7900D series: H23 (hemming, for medium-weight)
Model: MF-7922-H22/UT
Reference: MF-7523D-E11
Flat-bed, top and bottom coverstitch machineMF-7500/7500D series: E11 (Elastic lace attaching)
Model: MF-7523D-E11