What you ahve is 100% mint made. The lines are on the planchets and a complete strike will obliterate them. The places where you have lines are places where there is bare, unstruck planchet.
My best opinion is that you have a very soft strike, possibly a die trial strike, but they are usually softer than this one. I highly doubt it has anything to do with obstruction such as grease - just no evidence of it.
Disclaimer: While a tremendous amount of effort goes into ensuring the accuracy of the information contained in this site, Coin Community assumes no liability for errors. Copyright 2005 - 2026 Coin Community Family- all rights reserved worldwide. Use of any images or content on this website without prior written permission of Coin Community or the original lender is strictly prohibited. Contact Us | Advertise Here | Privacy Policy / Terms of Use