Albert Nestler, a German firm, was also an OEM supplier to USA slide rule companies like Weber and Staedtler.

REF Nestler Mannhiem - Magnifying Cursor	Nestler Mannhiem - c1917 Made in Germany, English text Front Scale 25cm // A [ B, C ] D \|\| 10.75in Back Scale [ S, ST, T] Slide Rule Data Slips Well Scale 21 inch depth scale Donated by Marsha Boulton, UK. Used by her great grandfather, Thomas Boulton, who worked in the UK PORTSMOUTH DOCKYARD and was second in command as a shipwright from 1900 to 1946. Born around 1885? in Portsmouth and joined Portsmouth Dockyard as an apprentice 1903, achieving master shipwright 1917. During this time he undertook refurbishment of HMS Victory (Nelsons flagship and still the oldest commissioned warship in the World) and the Royal Yacht Britannia. Promoted to second in command in the historic Portsmouth dockyard and before WWII was designing and building warships including HMS Amphion in 1935. This was sold to the Aussies and sunk by the Japanese in 1942 having been renamed Canberra. Died in 1947 Marsha has two letters from the Admiralty, from 1944, thanking Thomas Boulton for his zeal in the war effort and commiserations to her great gran, the widow on his death.
S403 Nestler Mannhiem	Nestler Mannhiem (early - note screws on ends) Made in Germany - c1930's - May have been a US brand Front Scale 10in // A [ B, C ] D \|\| 25cm Back Scale [ sin, L, tg ] Multilined cursor Back: Equivalents (in English)
S477 Albert Nestler A-G No9	Albert Nestler A-G No9 Made in Germany Front Scale K, A [ B, C ] D, L Back Slider 29.3cm [ S, L, T ] 11-5/8in Multilined cursor
P044 Nestler 11-ZE	Nestler 11-ZE - Electro Closed Simplex Made in Germany - 10 scales Front Scale 13cm // .1-.7 Cos, KW(A) [ PS(B), CI, C ] D, .7-.995 Cos Back Slider [ S, ref, T ] 3 lined cursor Adv on Case: A.E.G.
P021 Nestler 11-ZM	Nestler 11-ZM - Closed simplex Made in Germany Front Scale 13cm // A [ B, C ] D Back Slider [ S, L, T ] Multilined cursor Back Adv: Ewald Friederichs.
P211 Nestler 11-ZR	Nestler 11-ZR - Closed simplex Made in Germany Front Scale (Note: no scale labels) 13cm // K, A [ B, CI, C ] D, L Back Slider [ S, S&T, T ] Multilined cursor
P008 Nestler 0121	Nestler 0121 - Closed simplex Made in Germany Front Scale 13cm // P, K, A [ B, CI, C ] D, S, T Back Slider [ LL1, LL2, LL3 ] Multilined cursor
P050 Nestler 0123 Rietz	Nestler 0123 Rietz - Closed simplex Made in Germany Front Scale 13cm // K, A [ B, CI, C ] D, L Back Slider [ S, ST, T ] Multilined cursor
P145 Nestler Rietz S	Nestler Rietz S - Closed simplex Made in Germany Front Scale 13cm // K, A [ B, CI, C ] D, L Back Slider [ S, ST, T ] Multilined cursor
P131 Nestler Polymath Pocket Duplex	Nestler Polymath Pocket Duplex Made in Germany - 22 scales Front Scale LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Rear Scale CT, T, ST, DF [ CF, CIF, CI, C ] D, P, S, CS Multilined cursor
P130 Nestler 0130 MultiMath Duplex	Nestler 0130 MultiMath Duplex Made in Germany - 28 scales Front Scale P, S, T1, T2, A [B, K, CI, C ] D, R1, R2, L, ST Rear Scale LL0, LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1, LL0 Multilined cursor
S326 Nestler "Kiel" 20 Hermann Schwerdtfeger	Nestler "Kiel" 20 Hermann Schwerdtfeger Made in Germany Front Scale 27cm // K, A [ B, C ] D, L \|\| 1:25 6.8m Back Scale [ sin, sin/tg, tg ] Multilined cursor Back: Equivalents (in German)
S266 Nestler 2012	Nestler 2012 - Closed simplex Made in Germany - Albert Nestler A.G. Lahr (Baden) Front Scale A [ B, C ] D Back Scale [ S, L, T ] Back: US Equivalents (English)
S436 Nestler 21 Darmstadt	Nestler 21 - Darmstadt Made in Germany Front Scale 27cm, L // K, A [ B, CI, C ] D, P \|\| Sin Cos, Tan Ctg Back Scale [ LL1, LL2, LL3 ] Multilined cursor, offset center hairline, KW, q, PSd Back: Equivalents (German)
S250 Nestler 23R Reitz	Nestler 23R Reitz - Closed simplex Made in Germany Front Scale (extended) 28cm // K, A [ B, CI, C ] D, L \|\| 1:25 6.5cm Back Scale [ S, S&T, T ] Well: 30-55cm Multilined cursor Th. Zlocha, Wien Back: Equivalents (German)
S565 Nestler 23RF Reitz	Nestler 23RF Reitz - Spanish Made in Germany (Instria Alemana) Front Scale 28cm // K, A [ B, CI, C ] D, L \|\| 1:25 6.8cm Back Scale [ S, S&T, T ] Well: 30-56cm Multilined cursor Back: Equivalents (Spanish) Donated by Bill Demian, Modesto, CA
S420 Nestler 23RF Reitz	Nestler 23RF Reitz - Closed simplex Made in Germany Front Scale (note change in extended scales from S250/S565) 28cm // K, A [ B, CI, C ] D, L \|\| 1:25 6.5cm Back Scale [ S, S&T, T ] Well: 30-55cm Multilined cursor Back: Equivalents (German)
S206 Nestler 0232 Reitz	Nestler 0232 Reitz - Closed simplex Made in Germany Front Scale 27cm // K, A [ B, CI, C ] D, L \|\| 10.5in Back Scale [ Sin, SinTan, Tan ] Multilined cursor Back: Equivalents (German)
S123 Nestler 0291 Polymath Duplex	Nestler 0291 Polymath Duplex - 1954 Made in Germany, 1954 - 22 scales Improved Dec Trig Log Log Front Scale LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Back Scale CT, T, ST, DF [ CF, CIF, CI, C ] D, P, S, CS Note: Pickett 140 Cursor Manual 2.44MB
S207 Nestler 0292 MultiMath Duplex	Nestler 0292 MultiMath Duplex - 1975 Made in Germany - 28 scales - dc 275 Front Scale P, S, T1, T2, A [B, K, CI, C ] D, R1, R2, L, ST Back Scale LL0, LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1, LL0 Multilined cursor: Kw, PS, d, q Manual 2.44MB
REF Nestler 29/52 Log Log Duplex	Nestler 29/52 Log Log Duplex - c1950 Made in Germany - 24 scales Front Scale: Note CT, T, ST, A [B, L, K, C ] D, P, S, CS Back Scale LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1 archive - Scan donated by Wayne Black, his personal SR
S254 Nestler 37 Elektro	Nestler 37 Elektro - Closed simplex Made in Germany Front Scale 287cm // V, PS [ KW, CI, C ] D, L(U) \|\| LL2, LL3 Back Scale [ S, S&T, T ] Multilined cursor Lahr, I/B, DRP