Many, many years ago I bought PFS a timeless gift. It is a simple leather petit modele agenda.
For many years I replaced the original calendar insert with the smallest Daytimer calendar which fit very well.
Hermes you will see the current model:
"Fauve PM Simple leather agenda cover, 2 7/8" x 3 7/8", one hook for refill, front and back pockets, calfskin $310.00"I paid waaaay less back in the day. Still in use, I think we got our money's worth.