I am late to this
thread but I recently discussed this with an
Aes Grave specialist.
The issue of storage and presentation are distinct according to specialist. Use
pvc free
flips for storage up to size/budget tolerance, which might mean purchasing a 50 pack of 2.5x 2.5
flips to store all of your
Aes Grave fractions. (Which are gigantic for ancients.)
If
budget does not support such large
flips, wrap the coins in acid-free paper. If the collector gets an opportunity to display
Aes Grave to interested viewers, (which are frankly few), then use an un-divided Abafil or similar tray. Collectors of
Aes Grave probably want to hold them in hand anyway.
Large
Aes Grave As (libral or semi-libral) and other large
cast coins simply do not fit well even in the double-deep Abafil trays. If the
budget supports
Aes Grave As, then you probably can find a way to obtain an undivided Abafil tray for display as needed. If you have several large
Aes Grave, (lucky you), store and display separately.
My
Aes Grave are kept in
pvc free
flips in cardboard "slab-size" boxes for the fractions, and my full
Aes Grave As are in Acid-free envelopes. I use nice pieces of felt to display loose large coins.