Check the listing for details. Vintage "Mars Bar" Porcelain Advertising Sign. Color: Multi-color, Condition: Used, Made in United States. Listed at 49.99 USD. This sale is for a vintage "Mars Bar" porcelain advertising sign. Apparently a lovely pin-up model was overlaid on an old "Mars Bar" advertisement. This porcelain version is a reproduction, unlikely The Mars Company" would use this ad to sell candy bars to kids. I also suspect this sign is very rare; I watch porcelain advertising signs daily, and I can't remember the time a similar sign was for sell.This sale is for a vintage "Mars Bar" porcelain advertising sign. Apparently a lovely pin-up model was overlaid on an old "Mars Bar" advertisement. This porcelain version is a reproduction, unlikely The Mars Company" would use this ad to sell candy bars to kids. I also suspect this sign is very rare; I watch porcelain advertising signs daily, and I can't remember the time a similar sign was for sell.