Peter,

I have the original oldies of some of those very same models. Nice picture. Here's an idea for you to try. If you notice the fine detail is not sharp, as in the lettering. You might try a tripod to eliminate any camera shake. Tripods are fairly inexpensive and I think you'll get good use out of it especially when taking pictures in low light.
The next thing is the light source. The knife at the bottom is under exposed. You can't see the name on the knife. You probably need to get a brighter light source or move the light source closer to the subject. The fact that you're getting "hot" spots tells me that the light may not be properly diffused to scatter the light evenly. If you're taking photos outdoors, the afternoon light out of the sun is ideal and gives good light with the proper color balance. Artificial light is tricky, especially fluorescent. Make sure if you do use fluorescent, to use "daylight" corrected bulbs otherwise you'll need to adjust the color balance somewhere in editing.
This isn't complicated, if you keep it simple you'll get good results, the right colors, and no editing later on.
I got so frustrated with taking indoor photos that I built a light box. I posted the photos of it somewhere within this thread. I find taking photos outdoors gives the best results but that's not always possible so the box is the second best option.
We have some other rather intelligent people here that
I'll ask to weigh in on this topic and give their recommendations on your photo. Thanks for your post.

Best,
Warren