Bill,
You will love it, and the price is very good IMO.
I've been watching it for a long while. He never showed a photo, or mentioned the dust cover. (why it didn't sell IMO). (and nobody seems excited about TT61).
When asked, surprisingly for that price, his response seemed to be, of course it is included, factory, very good condition, so be hopefull.
I find less info about the TT61, however, my guess is when you test it before you switch to yout TT71, you will find no performance difference. More 'primitive' looking speed adjustments, who cares.
I think a lot of the improvements, 61, 71, 81, 101, 801 were for progression/perfection of engineering in the peak of TT era with lots of competition from other great engineers. Awesome days.
They all maintain speed fantastically, all are solid whirling space ships, and the plinth is superb!