Described by the seller as having an "old museum number", this would otherwise be a choice example with great color and luster (number visible behind portrait)..

So far I haven't been able to learn why museums would paint a number directly on a coin or token, or when this practice was popular, but I have found several other examples of museum numbers on coins, particularly ancients.

About Daniel Eccleston
From Commercial Coins 1787-1804 by R.C. Bell, pp. 82-83
Eccleston appears to have lived in Queen-street in Lancaster at the time of the issue of this token. He was an enthusiastic numismatist, and this explains his exceptionally handsome coin struck upon a new principal with a broad rim to lessen wear.

The Lancaster Gazette of 1816 carried an obituary notice of Daniel Eccleston. It stated that be was born at Corna-row, in the Filde of Lancashire, and having passed several years in Antigua, Barbados, etc., settled in Lancaster, embarking in several trades successively as a liquor merchant, insurance broker, etc. He was a collector of coins and medals and had a large and handsome medal struck of George Washington, sending copies to the Government authorities in America, the Emperor of Russia, and other heads of state; while in 1794 he issued a quantity of halfpenny tokens bearing his effigy and name.

In these pursuits he squandered most of his property and in the later years of his life his means of support were supposed to be very limited. He was originally a member of the Society of Friends, but was excluded by that community through his total neglect of attending their meetings. The notice stated that his death had occurred at Kidside, near Milthorp, in his 71st year.

In the following week's issue of the same journal a notice appeared that Mr. Daniel Eccleston was not defunct, and referred the readers to an extraordinary letter from him purporting to have been written in the next world. It commenced:

"And the ladies cry, in doleful dumps,
' Daniel's dead! What's trumps? '"

The writer then thanked the publisher whom he addressed by his surname with the prefix of "Friend," for sketching his character; but complained of several errors. He ended with the remark, " We are totally precluded from giving you poor mortals any description of this Happy Country, and dated his letter from "his habitation in Heaven, the New Jerusalem, the City of the Saints." His signature was perhaps the most remarkable part of the whole communication.

"Daniel Belteshazzar Fitz-William
      Caracticus
         Cadwallador
            Llewellyn
              Ap-Tudor
                 Plantagenet
                   ECCLESTON ."

each title being on a separate line and inclining from left to right as here printed.