Vintage NOS Avocet seat post bolt/ nut/ spring

Description

Very hard to find to fix your Avocet seatpost.
These hold the upper and lower seatpost clamps together.
I actually have an avocet seatpost, so I knew exactly what this was when I opened the bag.
The one I am selling has a bolt length of 40mm. I have these in different lengths if needed.
Length calculated is the overall length.
Cleaned out the basement of a bike shop closure and will list more as time allows.
Also run a garage bike shop and receive many parts, thanks much-----------Mark