There were at least four Crown labels in the US and one in Canada.
On the Crown (US) page, there are five R&B singles with a three-digit number on the same Crown from the mid-1950s. But at the top of the page are two records from another Crown label with four-digit numbers.
On the Crown (New York) page are two more of the four-digit Crowns from the US page. There is also yet another Crown (NY) record there with a three digit number that appears to be a country & western recording, but it seems unlikely to be related to the R&B label.
The other Crown label from Hollywood shows two releases that were country, but it would seem a different label than the Crown (NY) that was also country.
After doing some research on Both Sides Now, I've been able to establish that the Crown (US) 78s listed here on 111, 118, 125, 131 and 142 are reissues of material from the Modern/RPM catalogue. This Crown label was owned by the Bihari brothers.
It began as an R&B reissue label, but by the late 1950s, having run out of Modern and RPM sides, the Biharis discontinued singles altogether and turned Crown into one of the most prolific schlock labels ever to sell a bunch of anonymous, recycled crap on an LP for $1.49, to the non-discerning customer.
This does look as if there's need for some clean-up. Thanks for pointing it out. Maybe I'll have time for this this weekend. Any other mod who wants to take it on, though, feel free to do so.