As pictured and titled. Would suit a late 80's early 90's era build. Never seen another one, very rare. 73g weight. £20 inc. UK postage. Paypal's fine.
They weren't that uncommon back in the day, but youre right, you don't see them now.
I have in one in sky blue and used to have a grey one that fitted bikes with no bosses with an integral clamp
For Sale 1997 Raleigh Randonneur in Reynolds 708.