Mass Production 1930 1980 (Non-Antique)
Phillips screws, engineered metal brackets and fasteners.
Wire nails,
Stamped plated hardware brass, chrome, etc
Wiping surface layering stains
Almost exclusive use of spray lacquer or urethane finish
Oil into Latex paint.
Common use of glue, urethanes, polymers, etc.
Thin plywood or pressboard backings, introduction of cardboard.