Dürkopp Adler 271 Instruction Manual page 43

Cl. 272-160362 Like the basic type, but with 6 mm stitch length,
with needle feed, large area looper (170%),
electro-magnetic automatic locking,
electro-magnetic sewing foot lift. Standard
equipment with keys for locking within the seam
progression, for needle high-low, single stitch and
tack call-up or suppression.
With sewing machine drive Efka DC 1500.
Cl. 272-640642 Like the basic type, but with needle feed,
electro-magnetic automatic locking,
electro-magnetic sewing foot lift, an edge trimmer
which can be connected using a hand lever and
which is driven by the sewing machine. Standard
equipment with keys for locking within the seam
progression, for needle high-low, single stitch and
tack call-up or suppression.
With sewing machine drive Efka DC 1500.
Cl. 272-740642 Like the basic type, but with needle feed,
electro-magnetic automatic locking,
electro-magnetic sewing foot lift, an edge trimmer
which can be connected using a hand lever and
which is driven by the sewing machine. Standard
equipment with keys for locking within the seam
progression, for needle high-low and/or single
stitch, tack call up or suppression and edge
trimmer on or off.
This sub-class requires a pneumatic connection.
With sewing machine drive Efka DC1500.
Cl. 273-140342 Like the basic type, but with intermittent roller
upper feed, electro-magnetic automatic locking
and electro-magnetic sewing foot lift; standard
equipment with keys for locking within the seam
progression, for needle high-low, single stitch,
tack call up or suppression and lifting or lowering
of the upper feed roller.
This sub-class requires a pneumatic connection.
With sewing machine drive Efka DC1500.
Cl. 273-140432 Like the basic type, but with intermittent roller
upper feed and electro-magnetic sewing foot lift.
Oil-free sewing area and grease-free loopers,
smaller lifting cam of the feed dog and changed
regulator for improving the smooth sewing result
in case of smaller stitch lengths and light fabrics.
Standard equipment with keys for locking within
the seam progression, for needle high-low, single
stitch, tack call up or suppression and lifting or
lowering of the upper feed roller.
This sub-class requires a pneumatic connection.
With sewing machine drive Efka DC1500.
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