Nice!
The vise I am currently looking at weighed in at 296, so the only matching catalog entry is for an 808. Problem is I can't confirm if there is a model no. on the vise, so the question is, is there an earlier model at that weight or is it just unmarked.
Thrumcap
Thrum, no sure if this helps but Parker made many different vise models over the years. Some short lived like the Victor, Parallel, and Semi-Steel models. The 2 longest lasting as well as most popular we're the Eclipse line, and the Superior line.
The 1st Gen Eclipse were 100 & 200 series, 200's being svivel base. These were replaced by 2nd Gen which are the popular 950 (stationary) and 970 (swivel base) series.
All Parker were robust, not light duty vises, but just the same, Parker referred to the Superior line as their heavy duty line. The 2nd Gen were the 800 series (stationary like your 808), and 820 series were the swivelers.
The first Gen Superiors were oddly named, they were 29x, 39x, 49x...etc for the stationary, and 229x, 239x and so on for the swivelrs. So the 60x Meats is referred to would have been the first Gen of your 808, and probably was in the same range.
Good luck on the hunt, an 808 would be a killer addition to any collection