Good for you - looks like your machine fits perfectly!

I found one of those at our local Habitat for Humanity Resale store on a day when they were having a 50% off for seniors sale.
I brought it home for $5.00 not knowing if it would fit my machine or not. I am able to make it work but it doesn't fit nearly as nicely as yours does. How do I know which machine it fits correctly as I am sure they were made for more than one style or brand of sewing machine?

I have one but don't know how to make it open like yours! It's exactly the same. I bought an Elna 704 Deluxe Pro Serger (which I am still trying to learn to use) about 1 year ago at a garage sale for $125 and the table came with it. I have actually tried to give it away several times and no one wanted it. Now I am going to keep it so, I dragged it out the other day and it is just the right height to use as a desk in my sewing room! After looking at yours, I am going to try to figure out how to open it up. If anyone could tell me, I'd appreciate any guidance.