I can show you a post in another forum, at least oh, seven or eight hours before Hilton posted here, which says they're mine.
On the subject of age, they have no numbers anywhere, and the logo is definitely a Shark, with the text saying "ERIK ANTON BERG, ESKILSTUNA, SWEDEN". Apparently the block capitals means slightly older. Three of them (the bigger ones) are about 5mm shorter than new, and the others are pretty much the length they came out the factory, according to post #6 in this thread.
I can't comment on the value of the chisels (I come to SMC to escape things like Fx valuation), however I can say that among the PM-11, marples and tier 1 white steel Japanese chisels (sinfully can't remember the brand), the Berg I got at the bottom of a rusty toolbox from a friends grandfather takes the keenest edge of all. Cheers, Mike