"tony sayer"

Or did you mean at the time the BC 109 came onto the market?


** The original BC108 series in TO18 pack preceded plastic equivalents.

The first plastic versions were the BC148 series and BC208 series in SOT25
and TO106 respectively.

The now ubiquitous TO 92 pack came later again.

See:

http://home.hccnet.nl/piet.blaas/gro...bc148b-500.jpg

and

http://www.buy-transistors.com/media...c/bc208b_1.jpg

The TO18 versions, being hermetically sealed, have proved to have longer
service and storage lives.


.... Phil