Date of acquisition: 2009/11/03
Provenance : Japon
RAM : 1568 / 1568 steps with OR-1E module.
Very rare, this model, designed for japanese schools is an intermediate machine between the DB-100 and FX-700p
As PB-100, it has only 544 program steps and accepts a memory extension of 1kB.
As FX700p, it has the F-key for direct access to mathematical functions.
No other details about this model on the web, neither photo of the box neither of the manual.