Up for sale is an original Marantz approval sample for the 3250B Preamplifier from the in-house Engineering department.

Blueprints, schematics, & measurements for making the sample for approval at Marantz. Dated April 25, 1978.

Amazing one of a kind rare piece of Marantz history.

Cover folder shows mild wear, contents look great.

Please see photo's for personal evaluation and specifics.

Free shipping included.