I would say it is ACxxx or AFxxx ; they were cased in metal can and
sealed with glass.
The coloured point was indicating the collector.
OCxx were cased in black glass with golden leads.
The so called point (white, red, green or yellow) on top was indicating
the gain range like, A, B, C today.
The second one on bottom was indicating the collector.

All were Germanium transistors (take care, ||Vbe||=0.3V).
Then came the 2N4xx.

a écrit le 20/02/2019 Ã* 06:13Â*:
In the 1960s the pocket radios hit the market and were sold everywhere.
I have not opened one of them in years, but I recall the transistors
used in them did not look like more modern types. They had a small metal
can. Just a straight sided metal can, shaped like modern capacitors, but
bare metal. Some had colored dots on them to identify the leads too.

First, I am thinking that they were geranium types. Is that correct?

Second, I have a very old GE transistor manual (edition 2) (PDF). No
where in there does it mention the case style of them. What is the case
style?

Seems those type of transistors came and went quickly. I assume they
were the first generation of transistors.

Shortly after, I recall seeing a lot of metal cases that were shaped
more like a hat, with a brim. Those too vanished. And I recall seeing
some of the hat shaped types with a point sticking out of the top. I
always wondered what that point was for???