Hiwatt SA412 back panel

[Decades_d]

I've tried other forums but no success as yet so hopefully someone can help me here -
I have acquired an SA412 combo. From what I've read, it was probably made in the mid-1970s and is quite rare.
It was acquired as part of an auction job lot and I already have too many amps and my playing days are over anyway, so my plan is to sell it on.

However, it is missing its rear panel. I've resorted to making one up but I've had to guess what it should look like so I'm hoping someone will have some pictures of the rear of an SA412 with its rear panel in place so that I can make a more accurate replacement.

When I got the amp it had no valves, no Hiwatt logo, no drivers and wasn't working so I gave it to a local amp tech in Hants. UK where I am based, to see what he could do.
He found a broken connection which he fixed, and he installed a set of used valves. I found a matching set of vintage Fanes (although sadly not Hiwatt/Fanes) and the amp fired up and sounds pretty good to me.
I've also had a replica logo made up and fitted - perhaps not as good as the original but not a bad likeness.

So all I really need before selling the amp is to fit a rear panel. I've fitted the one I've made up for now and, if necessary, I will sell it with that fitted.
But I would rather have a rear panel that looks like the original so if anyone is able to point me to where I can find a picture of one I'd be very grateful.

[mhuss]

I have very few pictures of the elusive DR412, and none with all it's back panels mounted. However, it looks like there were two panels. One large square-ish panel completely covering (sealing) the speaker section (with perhaps the traditional 4x12 port on the bottom), and a 'normal' head back plate on the top.

--mark