Keuffel & Esser Audiovisual Diazo Transparency Masters VINTAGE Instructors Ref. Educator-Approved ALGEBRA Start Price USD 20,000.00 Current Price USD 20,000.00 Time Left - Bid Count 0 Buy It Now Price - Reserve Price - Start Time Saturday, August 16, 2008 End Time Tuesday, August 26, 2008 Location NW Wisconsin See more about 'Keuffel & Esser Audiovisual Diazo Transparency Masters' Description Up for auction is this unique, vintage piece of educational history.  Here is a Keuffel & Esser Audiovisual Educator-Approved Diazo Transparency Master for Algebra.   These are the master transparencies used by the instructor for the entire Algebra course.  They are dated 1968 and in excellent condition.  Please look at the pictures for more detail.  Up for auction soon will be the following Keuffel & Esser Audiovisual Educator-Approved Diazo Transparency Masters: Chemistry - 1962 Descriptive Geometry - 1969 Earth Sciences - 1968 Electricity - 1967 Geometry - 1962 Instructional Media - 1969 Physics - 1962 World Cultures – Canada - 1968 World Cultures – Latin America - 1969 World History – Unit 1 Sub-Saharan Africa – 1966   This auction is for the ALGEBRA masters only.  Please contact me with any questions. Paypal only please.   Place a Bid!