There’s a stamp people group in Sydney called Philas. Every 4 years, they run SSE expo, and this year, it changed its name to SSCE2019.
I received a draft of logo in following four variation (shown on left). Which to my surprise, it was designed in Microsoft Excel. I don’t like them, and I spent time and recreated one (shown on right). I spent time to incorporate both stamp and coin clearly into the design. They took my design.