I have put together several sets from the 50' and 60's with centering being the most important feature for me when purchasing cards. If its centered then I'm interested in looking at the other conditions the card will have like corners,gloss ect. My centering range is 35/65 or better. IMHO the cards are meant to be 50/50 all around so anything less than that means they are "off manufacturers spec's". My 40 years in the printing industry (25 yrs. production manager) tells me however that perfect cutting of any item is almost impossible even with todays best equipment,let alone the cutting challenges printers faced from the 20's thru the 70's. The Mantle card looks great because it's well centered but I'm not sure if I could say that about it at 10/90. Just my old printer opinion. Jim