If it's not compromising the structual integrity of the headstock, I'd leave it. Even if you had it repaired, you'd still know it was there. If it were mine, I'd get it checked over though, just to see if any cracks had developed & take advice from the luthier.
Fender do this sort of thing deliberately & stick another thousand on the price!
'Rickenbacker'...what a name! After all these years, it still thrills me.
I, on the other hand, would most certainly fix it. JetGlo is the correct* colour for broken necks, cracked bodies, split tops, and chipped headstocks! It's easy to fix with minimal scarring, which can't be said for MapleGlo or FireGlo. A little body putty, and some new finish around the area shouldn't cost the Earth, and will make it look as good as new.
*I believe the term "refinished JetGlo" on a vintage Rickenbacker actually translates to "broken guitar lies beneath!"
Two wrongs don't make a right, but three rights do make a left.
I've swung pegheads into doorways, etc. AND IT ALWAYS MAKES ME FEEL AWFUL. The worst was when my tuner jumpred from my hands and landed on the lower horn of my 360V64, leaving two small dents.
I didn't bother repairing the dents, but you.... I would have that fixed.
No, I don't have the missing peice. If I did I would just glue that back in and there would be no dilemma. It happened in a dark club, and I didn't realize it at the time. The guitar stayed in tune!
There are no cracks, it's been over a year and half since this happened, and the guitar is still fine so I am doubting this will get worse or anything all on it's own.
I just hate the idea of not haveing this guitar for a few weeks.
So much for the doofuses who spread stupid rumors that Ricks go out of tune in the case!
“I say in speeches that a plausible mission of artists is to make people appreciate being alive at least a little bit. I am then asked if I know of any artists who pulled that off. I reply, 'The Beatles did.”
― Kurt Vonnegut