Tim,
   We had a similar question asked in a moderated group and got this reply:
Here is a complete list of Vivitar
numbers as received from Vivitar.

Francis in VT

Dear Customer,
We have the disignations they are:

1) Universal screw mount, Pentax etc.
2) Exakta
3) Nikon
4) Canon FL/FD
5) Minolta MD
6) Miranda Sensorex
7) Konika
8) Pentax ES
9) Miranda Auto Sensorex
10) N/A
11) N/A
12) N/A
13) Topcon
14) N/A
15) Topcon super D& D-1
16) N/A
17) Topcon Auto 100
18) N/A
19) N/A
20) N/A
21) Olympus OM
22) Pentax K
23) Fujica
24) Yasica / Contax

So it looks like you are going to have to post a picture, or at least a link
to a picture of the mount in question.
Mike