Sorry but have not had as much time as usual !! Friedrich is correct,, only he and I have been helping regularly here !! I would suggest not to pay for anything on this site !! The price guides are seriously outdated and do not reflect todays market values !! As to your plates they may not be as old as you may believe!! Looking at the foot ,, there is little age that I can see ! These were exports and the marks on the plates may say they were done in the style of older plates but does not make them that old !! The artwork is not that good !! Looks to have been done in a hurry !! I do not see the quality that they should have as older plates do !!