Long time no see, how are you?
Series 283, called "Ocean Allow", was debut in 1996, but it's sharp and stylish even now.
I have been on Ocean Allow two times.
At both of them I used Green Car reservation seats but I had no chance of getting a ticket of 1-A / 1-B / 1-C observation seats.
When you use Green Car of Ocean Allow, only 1-A / 1-B / 1-C observation seats (on trains going to Shirahama and Shingu) give us the most pleasant time.
Therefore I'm jealous that you exprienced a great time with 1-A which the most valuable seat of Ocean Allow.