It’s time to catch up on the week that was in numismatic insights and news.

Coin World is looking back at its five most-read stories of the week.

Click the links to read the stories. Here they are, in reverse order:

5. Researcher seeks evidence of third 1873-S Seated Liberty quarter dollar reverse: Greg Johnson states he has never seen an example of the Open 3 quarter dollar with a reverse that features a Double S Mint mark, the first punch too low, then corrected.

4. Three ways to overpay for coins: Senior Editor Jeff Starck explains three ways a coin collector can really mess up when it comes to buying world coins. 

3. Rarely seen in circulation: Monday Morning Brief, Feb. 8: When was the last time you received a $2 Federal Reserve note in circulation? How about a Kennedy half dollar? Or a Presidential or Native American dollar?

2. Current state of certified grading of coins: Q. David Bowers: "Very few people go beyond what is printed on a slab," Bowers writes. "They don’t care if it matches traditional standards or, for that matter, if it is as ugly as a toad."

1. 2016 Mark Twain silver dollar opening sales higher than two 2015 releases: The first day of sales Feb. 1 by the U.S. Mint registered total sales of 33,500 coins, which was a higher percentage of the available mintage than opening days for last year's U.S. Marshals Service 225th Anniversary and March of Dimes silver dollars.

Connect with Coin World:  

• Sign up for our free eNewsletter
• Like us on Facebook  
• Follow us on Twitter