Yes. these are New York 'string of pearls' precancels. They are not listed in the PSS Town and Type catalog as they have no city name, but they are listed in Dave Smith's "Silent Precancels".
These are sought after by US "Fancy Cancel" collectors and do add a premium to the value. The 3c is the best one in your selection. The faint and partial cancels are less desirable. The decent cancel on the 50c turns a near-worthless item into something worth a dollar or so.
its the most common of silent precancels on the postage dues, available on J1-J7 with Y facing left and right and sometimes doubled ( worth alot more) J15-J21 are not as common. If you were to put together a J1-J7 set with all nicely centered cancels you could get a nice premium since alot of them are only 1/2 on the stamp like your 1,2 and 50 cent
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