A recent find, please can anyone tell me anything about the brand and the age of the sharpening stone ?

Its about 10 inches long and branded Kresny's Fierrondum

Dead end ? Me too !!

from bidorbuy.co.za

"Look closely at the inscription: "Kresny's Fierrondum Foreign"

If you've never seen one, it's because it's so rare - and it is in unused condition.

The oblong shaped scythe knife sharpening & honing stone tool is 25cm/10inches long.

Country of origin: England"

location listed as South Africa