Sailrite Carrying Case
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The following is some additional information that may be helpful
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This machine was built in Bridgeport Conn.
The W stands for Wheeler & Wilson plant
The Singer serial # records for this plant were lost & exact dating may be tough.
This machine was produced in Scotland (Kilbowie) between 1957 & 1960
The black models are not as common as the 2 tone green model.
Singer made 3 zig-zag models in this style.
The 206, 306, & 319.
There is really a 4th. Very rare. The 320 which is a free arm.
All these machines are almost the same except for the cams systems.
These are called swing arm machines as the zig-zag needle bar pivots from the top as a pendulum
This is the same mechanism for in the Pfaff 130.
In most Zig-Zag machines, the needle bar is in a bracket. the whole bracket moves in zig-zag.
The hook is full rotary.
This is a feature found on most industrial machine & only the high end home machines.
It is a very versatile machine that was design to handle just about any job needle in a home application.
The following is a chart from the manual
The cam mechanism for decorative stitching works independently of the stitch length lever.
The 306 machine uses only one cam at a time.
The 319 has three built in & one removable.
Any combination of these 5 can all work at the same time.
The following is from the 319 manual