Good preowned vintage condition.  Some scratches and some color loss. 19 in.wide x 7.75 tall. This piece may be promotional display item that was created to celebrate the company's 100 year anniversary, which spanned from its founding in 1903 to 2003. it may have had some way to hang it but it no longer exists.

It was used as a showroom display or a dealership promotional sign.

Material: Some versions of these signs are noted to be made from plexiglass or acrylic and could even be lighted. The design is etched into the material. There is decal added along with paint for coloring.

Design: Features the iconic winged 100th-anniversary logo with the dates 1903 and 2003 on either side of the "Motor Harley-Davidson Cycles" bar and shield.

Variations: While your item is a large plexiglass sign, this specific logo was also reproduced as smaller fuel tank emblems, fender decals, patches, and limited edition pins during the 2003 model year. 

The 2003 model year was a major milestone for Harley-Davidson, resulting in record sales and a wide range of collectible merchandise tied to the 100th-anniversary celebration.