The crystal is styled after the lightly domed top 330W18GN crystal and is not the style that is flat on top. In testing the domed version of the crystal was more resistant to chipping and makes the dial look better.
Please also double check your watch has the correct caseback, as many have been swapped over the years and if it is wrong, I may send you the wrong seal kit.
I now have two postage options. The free post is tracked DHL eCommerce worldwide. The optional post is tracked DHL Express worldwide (approx 3-7 days). I do not offer local pickup.
For more SEIKO tech information and chat, try WristSushi -
http://www.wristsushi.com
My website is here -
http://www.vintagetimeaustralia.com
Youtube channel here -
https://www.youtube.com/user/hal0eight