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This Template covers most of the old cast metal SINGER machines for HOME USE but not all of them.If your machine is the 3/4-Size model with the 12 to 13 inch Bed (30cm to 32cm) then you have the Model 28.Look at the pictures below to confirm your machine's identity. You have indicated that your machine has the "D" shaped Needle Plate. If the Sewing Bed is 14 to 16 inches (35 cm to 41 cm) it is a Full-Size.If your machine is the 3/4-Size model with the 12 to 13 inch Bed (30cm to 32cm) then you have the Model 128.Look at the pictures below to confirm your machine's identity.