AMR 300 vs AMR 500 how to identify ?

[samotorsport]

Hey guys , i found a used supercharger , this is the only picture i have so far , he is not sure if it is a 500 .
Can one of guys let me know if this a AMR 500 i
Or maybe just a 300 ? Where can you see the difference ?
Looking for one to build a 1600 cc engine for my 67 bug next winter .
Where do i get spares to overhaul those things in europe ?
Thanks in advance
Greets
Sam

[cel]

Hi Sam!

Here are some pics where you can see the difference between the two.

https://www.amazon.de/Turbo-Kompressor-volumetrischer-300-AMR-500-amr300-amr500-Supercharger/dp/B0799MLPCV

Nice greetings!
Marcel

[samotorsport]

So from the pic it looks more like a 300 i guess