300 or 500?

[basscoach]

I’m sorry to ask, I’m having difficulty getting a definitive answer from google searches, but on the evidence of this image, is anyone from the community here able to identify if I have a 300 or 500 model? 
Or from the serial number, can I identify it?

 

I’ve had a red Variax before, it had the 6 in line headstock, but had the larger a/b switching box with xlr, but was identified as a 300. 

But my current one has the small black plastic box. But a lovely neck, nicer than the red one.

Anyway, sorry if this question has been asked many times before, but would appreciate any help you can give.

Thanks,

John 

[silverhead]

That's a Variax 500. You can tell by the headstock. Just Google an image of both to see the difference.

[basscoach]

Thanks @silverhead 

I assumed it was. Unfortunately when I did google, it had some images of the 3+3 headstock as 300’s, hence my confusion. 
 

I was also hesitant due to the connecting power supply, as again some 300’s appeared to have the switching box and some the smaller plastic one like mine. 
But I guess the power “box” isn’t the identifier. 
 

Appreciate your help. Thanks again.

John 

[silverhead]

You may be confusing the larger power supply 'box' with the smaller Workbench Hardware Interface device. They are separate devices. Both the Variax 300 and 500 use both boxes for different purposes. 

[psarkissian]

It's a 500 electric, the pick-guard is the giveaway.

 

[basscoach]

Thanks @psarkissian