My one-owner, 34 year old Speedmaster 345.0808 today. Not because it is Tuesday, but because I have worn my Rolex Date-Just for the last month, and I wanted a change. This model with the sapphire case back, and the gold plated calibre 863 movement was the first Speedmaster with the see through case back, introduced in 1980. This one has had very little wear in all the years I’ve had it. I gave it its first service in Feb. 2023, so it should be good for another 34 years!🙂