My personal grail is a Richard Mille RMS05 https://www.richardmille.com/collections/mechanical-fountain-pen
Visconti Homo Sapiens Bronze Age. I really like the look of that pen but I will admit to some serious reservations regarding their nib QC. I don’t expect to pay out that much for a pen and then have to send it to a nibmeister to get it to write properly. It is all dreaming anyway. No way I can spend that on a pen any time soon and I’ve more than enough of my own pens to rediscover.
I would want a slightly longer version of a kaweco sport with an integrated filling mechanism and a broad nib. I almost have that with my shaeffer pocket pen, but it needs more length and a clip.
Not sure if it’s my grail pen but lately I’ve been drooling over Maki-e pens, especially the Platinum 3776 urushi maki-e. I’m currently looking for a new job and I think when I get one it will be my present to myself.
I am happy to say that I have none now. Not that I have gotten all the pens I fell in love with but I am happy with my 2023 purchase. Maybe as 2024 rolls around I may reopen the conversation with myself again.