The upscale Manhattan jewelry shop happens to be less than a 5 minute walk away from his home-away-from-home — NBC headquarters at Rockefeller Center.
Several sources confirmed he was at the store for a set of matching custom bracelets and that he met with high profile jeweler Izzy Avianne.
Avianne is reportedly "putting the finishing touches on matching white gold studded diamond bracelets," according to a witness who was at the shop at the time and saw Davidson and the jeweler.
The source also noted that one of the bracelets has his initials and the other has hers. The word "apple" and the number "426" are also said to be involved in the "stunning" custom set.
One sweet snap was a selfie of the lovebirds cheesing for the camera, while another showed the Big Time Adolescence star laying in his girlfriend's lap as they both puckered up for a kiss.
Despite previously keeping their relationship lowkey, Kardashian promised in an interview with Variety that details of their red-hot romance will be revealed in their upcoming new Hulu series, The Kardashians.
Although Davidson isn't currently on the show, the SKIMS founder explained the highly anticipated reality series would answer all of their fans' burning questions including how they met, "who reached out to who" and other juicy details. "I'm definitely open to talking, and I definitely explain it," she concluded.