Hey Jay,
I just mean that the elements of the core -- the date numerals, oakleaf spray and cypher -- are rendered in specific designs used only on 1914 EK2s. The designs of all authentic 1813 EK2 cores are well known (there are only about five known 1813 cores) and are different in every aspect from the eBay piece. Also the frame is a 1914 type. 1813 EK2 frames have a different look with a higher bead count.
Have a look at an original 1813 EK2 and compare to the piece on offer.
Here is an original:
Hope this is clear.