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Item #  Item          Showing items 1 to 20 of 48 items found. MB Now At Next Bid
4003 Albert Einstein Autograph Letter Signed with E = mc2 (October 26, 1946) — ALS $25000 $111111 $122223
4002 Albert Einstein Autograph Letter Signed with Gravitational Field Equations (December 24, 1933) — ALS $5000 $24200 $26620
4001 Albert Einstein Typed Letter Signed with Handwritten Equations on Spacetime (December 17, 1933) — TLS $1000 $6380 $7018
4005 Albert Einstein Typed Letter Signed on Hitler and Planck (September 20, 1934) — TLS $1000 $2860 $3146
4016 Max Planck Autograph Letter Signed on Ether and Relativity (March 21, 1920) — ALS $200 $2426 $2669
4013 Max Planck Autograph Letter Signed on Einstein's Theory of Gravitation (October 19, 1919) — ALS $200 $1450 $1595
4015 Max Planck Autograph Letter Signed in Defense of Einstein's Theory of Relativity (January 25, 1920) — ALS $200 $1419 $1561
4007 Max Planck Autograph Letter Signed on a Differential Equation (October 5, 1897) — ALS $200 $1264 $1391
4019 J. J. Thomson Autograph Letter Signed on Silberstein's Lectures (October 3, 1911) — ALS $300 $533 $587
4008 Max Planck Autograph Letter Signed on a Scientific Paper (July 27, 1901) — ALS $200 $458 $504
4014 Max Planck Autograph Letter Signed on Nobel Prize and Platinum Meter Standard (November 30, 1919) — ALS $200 $433 $477
4010 Max Planck Autograph Letter Signed on Different Electron Theories (October 22, 1906) — ALS $200 $433 $477
4022 Albert A. Michelson Autograph Letter Signed on an Ether-Drift Experiment (December 21, 1922) — ALS $200 $433 $477
4043 Harold Macmillan Document Signed and Percy Nunn Autograph Letter Signed — DS and ALS $200 $400 $440
4006 Max Planck Autograph Letter Signed on Research Topics (June 12, 1896) — ALS $200 $393 $433
4009 Max Planck Autograph Letter Signed on Objections to the Electron Theory (July 20, 1906) — ALS $200 $357 $393
4025 Bertrand Russell Autograph Letter Signed on Geometry (March 12, 1918) — ALS $200 $357 $393
4017 Max Planck Autograph Letter Signed on Gravitational Redshift and Ether Theory (April 17, 1920) — ALS $200 $335 $369
4011 Max Planck Autograph Letter Signed on Max Abraham's Theory of Gravitation (February 14, 1912) — ALS $200 $324 $357
4012 Max Planck Autograph Letter Signed on World War I and Family (August 4, 1919) — ALS $200 $324 $357
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