PDP-11/20 vd one that just says pdp 11 what are the date differences?? OEM?

[william degnan]

On Tue, Feb 23, 2016 at 7:28 PM, Michael Thompson <
michael.99.thompson at gmail.com> wrote:

> The PDP-11 at the RICM says "dec pdp 11" on the system configuration paper
> label on the back, and "M11 15" and "4720" on the metal tag. Unfortunately
> it has an OEM front panel.
>
> --
> Michael Thompson
>


are  you sure its not H720 rather than 4720?  H720 would be the type of
power supply from an original 11.  M11 15 would seem like the OEM 11/20
after they abandoned the 11/10 model.  My hunch would be the date code is
late 1970 early 1971.
-- 
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