Very nice Roberval scale, Manufactured by Johnsons of Hendon. Typical style like a letter scale, but with one removable larger pan. This kind of scales are often in use for weighing photographic chemicals.

These scales are entirely complete. They come with x2 125g weights,60g,30g,15g,10g,5g,3g,2g, and a number of ounce rods.  They also have a 1/4 teaspoon measure made by Hilite, UK.  The balance arms are imprinted: Made in England and 'Warranted Accurate'.