10 x 10 Duct Hole] Vent Cover. Aluminum Return Grille HVAC Ceiling or Sidewall Grille Without Damper -Easy Air Flow - Gable Vents. Designed for Extraction of air. [11.6 x 11.6" Face] - - Amazon.com
Smooth-Air Products Ltd
A920, Perforated Surface Mount Return Air Grille
Grilles, Registers & Diffusers | Greenheck
History of Historical Arts and Crafts Decorative Style Grille | Beaux-Arts Classic Products
hard to find original and intact c. 1898 tuttle and bailey residential and commerical air register grille product catalog