Love the Gothic on the front cover. Thankfully not continued inside.
The Brunsvega reminded me of my computer course at Wandsworth Tech in the early 1960’s where it was used to introduce techniques of multiplication on the basic computers of the era. I later programmed mainframes that did not have hardware math units to do multiplication using the shift and add principal from these machines! So if your bank interest in the 60’s/70’s was wrong, it was probably me.
Roy.