Tiffany setting. Chanel classic. Have them for more than 5 years and still love. I'm a classics girl.
By the way Tiffany Australia and Asia (I've enquired in Singapore, Malaysia, Taiwan, Thailand, Hong Kong, China, Japan, Korea. I'm not obsessed, just that I travel and whilst there, I get my rings cleaned so I chat with the SAs and I ask) doesn't offer upgrades.
It's odd that you weren't allowed to take photos. I've been to numerous Tiffanys around the world and have never been rejected a photo. These items are available online, heck their engagement ring app even allows you to "try on rings" visually.