[Boatanchors] Accurate Instrument Co. 151 tube tester manual sort of needed

[D. Robbins]

Greetings, Got a nice looking "Accurate Instrument Co." tube tester
model 151 ............but it came with a 157 manual. Everything inside
appears the  same from the schematic, with the addition of a few more
sockets on the 157 and the meter moved from the center of the unit to
the left in the newer 157.
Though I am sure there is no other difference, and the tube charts
should be the same, the proper manual would be preferred if a PDF is
available and not too much trouble.
Thanks,
Dave