Hi Nyasaland,

The sticker is the Model no, which you know is 320 series.
The Numerical sequence is the Serial no. So its the 14,861st built, assuming this series started at 0 like most models.

The code tells us the Engine manufacture is June 16 1980.
Also as youve worked out its a 3.5 hp 4 stroke, which is correct per the diagram for your Mulcher Mower.

The Model no 92908 will help you when buying parts for the engine

The Mower Model no 320004 will help with mower parts also..

Thats about it, A few more snippets of info can be found in the Type" and last 2 digits in the Code"sequence...But its not so much relevant to your restoration.

If you need help with parts and restoration or any technical info, Moderators Grumpy' And Deejay are the B&S and Scott Bonnar Gurus who can answer your questions...:)

Some pictures of both your machines, when your able will also be appreciated:)
.