National Rotary Machines

Rotary Shuttle Machines

– One bobbin cover plate to the left of the machine. Serial number at base of upright pillar or on the underside of machine

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Model	Size	Body Shape	Inspection Plate(s)	Upper Tension	Stitch Length Control	Notes
Rotary A1	Full	Rounded	Shoulder	Front	Bed Screw	(Eldredge Rotary) 1904-08 Early bobbin & case. The hook cover has curved edges, whereas all later machines had rectangular hook cover plates.
Rotary A2	Full	Rounded	Shoulder - Centre Arm Raised	Face Plate	Bed Screw Lever	(Pritzlaff) Not Reversew (National's name for reverse sewing ability), non-electric. Rotary machines manufactured after January 1st, 1916 use certain slightly different parts eg tension and face plate.
Rotary A2 (no picture)	Full	Angular	Shoulder - Centre Arm Raised	Face Plate	Bed Screw Lever	Law p.22
R41	Full	Rounded	Shoulder - Centre Arm Raised	Face Plate	Bed Screw Lever	(R41) Modernized Rotary A c1948: Reversew, separate reversing knob on bed. Non-electric.
Rotary B	Full	Rounded	Shoulder	Face Plate	Bed Screw Lever	Internal motor patented Oct. 5, 1920 by Charles H'Doubler, later modifications. Electric, not Reversew.
Rotary 110	Full	Rounded	Shoulder - Centre Arm Raised	Face Plate	Bed Screw	(1100) Hand crank c1929.
Rotary 1120	Full	Rounded	Shoulder	Face Plate	?	(1120) Electric portable.
Improved Eldredge IEB	Full	Rounded	Shoulder	Face Plate	Pillar Lever	Electric model, motor not built in, Reversew, krinkled finish. Light patented in 1935. Bed 14 5/8" long x 6 13/16"
R40	Full	Rounded	Shoulder	Face Plate	Pillar Lever	(R40) Electric, Reversew (no knob on bed of machine). c1949
Machine#32-16055(model name or number unknown. 32?)	Full	Rounded	Shoulder	Face Plate	Bed Screw Lever	(Princess) Features of R40 (electric Reversew without the reverse knob) and R41 (non-electric Reversew with the reverse knob, but without the central spool pin towards the center of the arm). Sub model version of the R41 with the Rotary B body. Separate reversing lever knob on bed.
RBR-2W	Full	Rounded	Shoulder	Face Plate - Inside	Pillar Lever	(RBR-2W) Reversew, electric.
N50	¾ Sized	Angular	Rear	Face Plate	Bed Screw - Front	Made by Portman, not National, and sold under various names. See Portman album in NeedleBar's Picture Library.
Rotary 'D'	¾ Sized	Rounded	Shoulder	Face Plate	Bed Screw	1935. Aluminum body, motor to front. Charles H'Doubler's thread control mechanism in the machine head. Sold as General Electric.
Two Spool	Full	Rounded	Shoulder	Face Plate	Bed Screw	(Eldredge Two Spool) Uses small spool of thread in a canister instead of a bobbin in a case. Later machines were electric using same electrical parts as Rotary C. 1914/1916 onwards. Serial numbers begin with H, after inventor Richard Hohmann.