This is indeed a nice contemporary keris Pusaka. AFAIK most of empu Djeno's keris came with certificates of authenticity. Do you have one for this one? Not that it couldn't be faked. If you provided some really detailed photos maybe one of our more learned members might be able to make a judgement. I would also think that since his nephews are carrying on with this work and all this was done within human memory perhaps they could ID it if you sent them photos. But i do not know the address you would need to send them.