Pinblock Question

[Phil Bondi]

Hi All.

I met a 1929 Bechstein Upright today. Its condition is 
pretty remarkable, but there's a question:

This piano has an open face pinblock, and it has 85 notes.

I thought that by 1929, open face pinblocks and 85 note 
pianos were a thing of the past..obviously I'm wrong.

When did open face pinblocks and 85 note pianos become extinct?

Thanks,

-Phil Bondi(Fl)