On topic.
1974 is probably a serial number.
Vijon is both a location in France and the model name of a bunch of different clarinets.
I'm not going to attempt to say that your clarinet looks like a specific make & model. It's not my expertise. Sorry 'bout that.
The clarinet looks like it's wood.
So, you work for the Department of Defense or are, at least, applying for a job there. Please don't call in a B-52 strike on my house. I know of some locations I wouldn't mind you calling in an airstrike on.
Vijon is probably a company that bought clarinets from a different company and just stenciled or stamped their name on it. It's trying to find that different company that's a tad difficult.
@Steve or someone who knows more about clarinets will hopefully come and post.