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K&E 4041 Family of Mannheim Slide Rules

Scale sets:

	A = B C = D   
	= S L T =   (L scale counts right to left)

• 4030 ------- 5" brass chisel point cursor. The scales have fine graduations the same as a 10" rule. No serial number. The rule probably was produced between 1901 and 1903. The frame was made of boxwood.

• 4031 #1 --- 5" Early metal framed cursor. There is an extended centi-meter scale inside the frame. The scales have fine graduations the same as a 10" rule. No serial number. The frame is made of boxwood instead of mahogany. The rule was probably produced between 1903 and 1906.
• 4031 #2 --- 5" Early metal framed cursor. There is an extended centi-meter scale inside the frame. The scales have fine graduations the same as a 10" rule. No serial number. The rule was produced between 1906 and 1910.
• 4031 #3 --- 5" All glass cursor with metal cursor blocks and a magnifier. The frame width is 21 mm. The scales have fine graduations the same as a 10" rule. No serial number. The rule was produced in 1914 or 1915.
• 4031 #4 --- 5" All glass cursor. The frame width is 21 mm. The scales have fine graduations the same as a 10" rule. No serial number. The rule was produced between 1915 and 1921.
• 4031 #5 --- 5" All glass cursor. The frame width is 21 mm. No serial number. The rule has coarse graduations that were used from 1922 on. The rule probably was produced in 1922 or 1923.

• 4032 ------ 5" Attached magnifier on cursor. The rule has fine graduations. There is an extended centi-meter scale inside the frame. The frame is made of boxwood or pear wood instead of mahogany. The frame is not adjustable. The rule probably was produced around 1900..
• 4032 #1 --- 5" Cylinder lens magnifying cursor. The rule has fine graduations. There is an extended centi-meter scale inside the frame. The frame is made of boxwood or pear wood instead of mahogany. The frame is adjustable. The rule probably was produced around 1903 to 1906.
• 4032 #2 --- 5" Cylinder lens magnifying cursor. The rule has fine graduations. There is an extended centi-meter scale inside the frame. The frame is made of boxwood or pear wood instead of mahogany. The frame is adjustable. The rule probably was produced around 1903 to 1906.

• 4035 ------- 8" Early metal framed cursor. The frame width is 23 mm. No serial number. The rule probably dates from 1908 to 1915.
• 4035 ------- 8" All glass cursor. The frame width is 23 mm. No serial number. The rule probably dates from 1916 to 1922.

• 4040 ------ 10" Early all metal chisel type cursor. Extended cm scale inside under the slide. No serial number.

• 4041 #1 --- 10" Early metal framed cursor. Extended cm scale inside under the slide. The frame width is 25 mm. No serial number. The rule is physically shorter than later models. The rule probably dates pre 1906. This specimen is in extremely good condition.
• 4041 #2 --- 10" Early metal framed cursor. Extended cm scale inside under the slide. The frame width is 25 mm. No serial number. The rule probably dates from 1906 to 1914.
• 4041 #3 --- 10" All glass cursor with metal cursor blocks. No serial number. The frame width is 25 mm. The rule dates from 1914 to 1915. This specimen is in very good condition.
• 4041 #4 --- 10" All glass cursor. No serial number. The frame width is 25 mm. The rule probably dates from 1915 to 1921.
• 4041 #5 --- 10" Decimal Pointing cursor. No serial number. The frame width is 25 mm. The rule probably dates from 1915 to 1921.

• 4041 #6 --- 10" All glass cursor. Serial number 17862. The frame width is 25 mm. The rule probably dates from 1922.

• 4041F ----- 10" Fine scale. All glass cursor. No serial number.The frame width is 25 mm. The rule probably dates from 1915 to 1921.

	A = B C = D   
	= S L T =   (L scale counts left to right)

• N4041 #1 --- 10" Improved metal rimmed cursor with magnifier. The frame width is 28 mm. Serial number 637745. The rule probably dates from 1936 to 1939.
• N4041 #2 --- 10" Improved metal rimmed cursor. The frame width is 28 mm. Serial number 337446. The rule probably dates from 1944 to 1946.

	A = B C = D   
	= S T L =   (L scale counts left to right)

• 4045 --- 16" All glass raised corners cursor. The frame width is 28 mm. No serial number.

• 4051 --- 20" Metal framed cursor. The frame width is 28 mm. No serial number. Very early, 1901 to 1909.

	A = B C = D   
	= S L T =   (L scale counts left to right)

• 4051 --- 20" Metal rimmed cursor. The frame width is 28 mm. Serial number 127931.

Special two line cursor

• 4052 D.L. - Special order dual line metal framed cursor offered between 1901 and 1913 in the K&E catalogs