Vintage Old Style Sign Sinclair HC Gas NOT Porcelain Made in USA 30×30. Brand New Not Antique Antique Reproduction Approximately 30″x30″ Single Side 18 Gauge Steel Durable High Gloss “Porcelain Like” Finish Made in USA MADE IN USA! All signs are produced after your order is placed. Once your order is ready to go, tracking information will be provided. THOUSANDS OF SIGNS AVAILABLE! Get images that make Supersized seem small. Showcase your items with Auctiva’s. Track Page Views With.