Believe it or not, and some purists would argue with me I suppose but both are nice collectables actually and as long as they are marked correctly then you're doing fine! One on left might be better I.D.'d by looking a bit closer -
https://goscf.com/t/30585&SearchTer...rate,reprintAs an added note:
{edit}I was led to that page by using the site's search function because I thought your first stamp shown (one on the left) was a
Jean de Sperati forgery but I am uncertain now..lol