Converting Postcard Design

I'm looking for a high-converting postcard design aimed at driving sales through a special offer or discount. The postcard should also instill a sense of trust in our brand.

Key requirements:
- Eye-catching design
- Clear, compelling promotional copy
- Brand colors and logo integration
- Trust-building elements (customer testimonials, industry awards)

Ideal skills and experience:
- Graphic design expertise
- Copywriting for promotions
- Experience in creating postcards

Please include samples of previous work.