Today I was looking at a stamp from the US.
At first I thought it was a certain type (CV $3). Next, I checked for watermark and my new conclusion was that it was a different type (CV $8). Finally, I checked the perf and came to the conclusion that it was another type altogether (CV 65c).
The bottom line, I found a very common stamp ... but fun for me to ferret out.
Since I'm new to this, I learn something new every day.
Are you finding anything interesting in your stamp research today?