Hi Herb,

That number is "house number." Those numbers hide the commercial equivalent
of that transistor. I doubt you will find any Motorola documentation giving
you an equivalent. There may be some cross reference guide somewhere that
some gracious soul assembled but I bet it will be without Motorolas blessing
!
There is a very high probability that you can substitute any of hundreds of
similar transistors and they will work, depending on the function of that
transistor. If it was used for RF amplifier service you could try a 2N3866
or 2N5109, for example.

I used to work for Western Electric and the Bell System did something
similar. We had "KS" parts. In most cases they were identical to
commercial parts but we did quality sampling, life cycle testing, etc. on
them and assured ourselves that we weren't getting scrap swept up off the
floor. For this we marked up the price about ten fold (!!!) as we supplied
these "approved" parts to our factories. The factories built things then
that they expected to last 50 years. Motorola probably did the same. This
also helped to keep repair technicians from substituting "commercial junk"
into Motorola equipment and destroying their pristine reputation. But I
digress......

Rick K2XT