Monaco 1886 - Rare 50c stamp. Telephones — Conversation Bulletin with Security Fund - Catalogo Yvert N 1. No Reserve Price

Monaco 1886:
Rare 50c. brown on yellow Telephone Conversation Bulletin stamp with a safety background formed by the words “Postes et Telegrafi Telefoni,” exceptionally well centered.
Yvert catalog no. 1. No reserve price.
Please carefully examine all the front and back images, which form an integral part of the description. You will receive only what is shown in the photos. Tracked, insured shipping.
The photos are very clear and detailed, but if you have any questions, I’m happy to provide additional images or information upon request.