Bosch EFAW70 Elektrotester Engine Tester.  This tester, which dates to the 70s, was used to test the electrical system of automobiles, trucks, buses and tractors.  The tester, which is enclosed in a suitcase-style case measures 19x14x7 inches.  User’s guide, in English, and other documentation included.  The instructions plate in the unit is in German, but I am including a scan of one in English, the plate you see below.  Cables included, although a couple of them could benefit from renewing; an easy upgrade.  The paint has some wear, but the lid and back are in good condition; see pictures.  Voltmeter gauge dial appears worn or broken, but I am including a replacement Voltmeter instrument in case you'd like to replace.   Great kit, rare, unique. 

From the manual, describing what can be tested:  On generators and regulators: regulating voltage at no-load, regulating voltage under load, commencement of current regulation on regulators with steep-drop characteristics, cut-in voltage, reverse current.  Batteries-voltage under load from starter.  On electric conductors: voltage drop in starter feed line, voltage drop in lines leading to other loads such as headlamp line, charging line, ground testing, open circuits.  Current consumption of various loads.  Ignition colis.  Ignition point setting.  Puncture strength of insulating parts.  Ignition and suppressor capacitors.

This item is heavy and bulky.  If you can pick it up in San Diego, it would be preferred.  Otherwise, I can ship it to you anywhere in the world.