[GreenKeys] When did 7 bits come about?

[steve bennett]

GKs,
  My M15 has a 5 bit selector but the posts where the springs attach have enough holes for 7 springs.When did 7 bit machines become available?
-Steve

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20250116/e857ae4e/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 1737040226539blob.jpg
Type: image/jpeg
Size: 4223961 bytes
Desc: not available
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20250116/e857ae4e/attachment-0001.jpg>