Tesoro GRAM XS Keyboard @ TechPowerUp
 

Tesoro adds another set of unique switches to their growing portfolio, and the new GRAM XS keyboard uses ultra-slim mechanical switches in linear or tactile/clicky versions. Combine this with chiclet-style thin keycaps and a low profile case, and we have a keyboard that looks like an OEM keyboard at ~23 mm in height while offering the features of a modern high-end mechanical keyboard.

https://www.techpowerup.com/reviews/Tesoro/GRAM_XS/