Radiator valve compression fitting query

[Nozzle]

I've purchase a nice set of rad valves to, they appear to have the compression fitting, brass olive and an additional brass ferule in a separate bag made in Italy.

The brass olive seems to have two radial ribs on it, unlike a normal olive. Some time in the future I might want to break this joint and remake it, and if I do can I use a normal 15mm olive or do I need to track down this special looking thing?

(Can provide a photo if my description is too poor)

Nozzle

 

[Nige F]

You'll be fine - olives have appeared in various shapes over the years. Thinking on I'll bet Sir Richard's Mrs. (Olive) has changed shape over the years too

 

[ianmcd]

Yes post a pic please