Iirc mine faded off.
The 1518 is a pretty hefty lift around 40kg 600 high 400 wide and 350 deep.
1513 is same high as the big one is wide, same or similar depth but skinny on width so must be around about 400 high 350 wide and 350 deep.
There's a load of variation over the years. Tolex/ greenish ratfur/ darker ratfur, red stripes/ none, Celestion/ Fane / Celestion For Trace Elliot speakers.
I think they all used the patented fading pen for the details on the input panel.