This authentic Omega black rubber watch strap (model number 98000364) was made for the 42mm second-generation Planet Ocean with calibre 8500 and a sapphire case back. It features an integrated fit and will not fit other Planet Ocean models.
This strap is in very good condition and I have given you clear images of the strap from multiple angles to help you see the quality before ordering. The strap in the photos is the exact strap you will receive.
If you are not sure if this will fit your watch or if you have any other questions, feel free to email me at Sales@TheWatchLink.co.uk. I'm happy to help!