SOSS Invisible Hinge, 1/2" x 2-3/8" (Pair) - Cabinet And Furniture Hinges - Amazon.com
SOSS® 220SS Series Invisible Hinge, 180° Single Action Hinge, UL Fire Rated Hinge for Wood or Metal, 316 Stainless Steel Material, Bright or Satin Stainless Steel Finish | Kitchensource.com
218-US10BL Soss 1-3/4" Invisible Hinge for Wood or Metal Applications in Oil Rubbed Bronze - Lock Depot Inc
218-US14 Soss 1-3/4" Invisible Hinge for Wood or Metal Applications in Bright Nickel - Lock Depot Inc
180 degree small SOSS concealed hinge manufacture - AliExpress
Soss Concealed Steel Hinge - Model #101 - Concealed Hinges
SOSS 216US26D Model 216 Invisible Hinge – Satin Chrome – Siggia Hardware