rivet counter
n.— «North End Train Center has some intense customers who Colley likes to call “rivet counters.” These are collectors who won’t buy an item unless it is absolutely correct and to perfect scale.» —“Small Business Scene: Miniature railroad store caters to one-track minds” Seattle Post Intelligencer (Washington) Dec. 11, 2008. (source: Double-Tongued Dictionary)
Further reading
You may have a favorite word in English, but what about your favorite in another language? The Spanish term ojalá is especially handy for expressing hopefulness and derives from Arabic for “God willing.” In Trinidad, if you want to ask...
It’s hard to imagine now, but there was a time when people disagreed over the best word to use when answering the phone. Alexander Graham Bell suggested answering with ahoy! but Thomas Edison was partial to hello! A fascinating new book about...