I do like a front panel! Here we have illuminated push-buttons, not toggle switches and lamps.
and I like it even more when there’s a short bootstrap routine printed out and taped on the front:
This is the DDP-116, from 1965, the first commercial 16-bit machine, selling nearly 200 units. Built to match the price of the PDP-5, using transistors for logic and core for memory, it was set back a bit by the PDP-8 coming out at a lower price.
The machine was invented because marketing wanted a machine to sell for $30k - that was the only constraint! (From this oral history of Gardner Hendrie)
More photos and info here
Main photos from Adrian Wise’s site which has much interesting detail on the series 16 machines:
(Edit: from a G+ post archived here.)