1st July 1939 - 90 centimes value military franchise stamp.

In 1901, France began the practice of overprinting current postage stamps with the letters "F.M." (Franchise Militaire). Distributed to enlisted men at the rate of two per month, the franchise overprints were valid for ordinary letters to France and its colonies. The stamps were used by the French military worldwide.

Catalogue numbers:
Yvert et Tellier FR FM9
Michel FR FM9
Stamp Number FR M9
Stanley Gibbons FR M518

Please note:

You can combine purchases to minimise postage costs.

1-9 eligible items - single charge

10+ eligible items - postage is free.

If purchasing more than one item, please DO NOT PAY FOR ITEMS SEPARATELY as ebay will charge you postage on every single item.

Instead, add your choices to the shopping cart (use "add to cart").

When you have finished shopping you can view your cart to finalise and pay for the lot at checkout, when your purchases should be automatically combined with the correct postage cost (if any).

https://www.ebay.com.au/help/buying/paying-items/shopping-cart?id=4360

-> The free postage for 10 or more items is for regular postage without tracking. If you require tracking, you need to select the postage method that provides tracking at checkout.