JSA Deacon McGuire Autograph on a 1877 Scorecard Assist

[gonefishin]

Requesting a little assistance regarding a very unique item I recently acquired. It is a JSA certified autograph of James Deacon Mcguire on a Spalding scorecard and features the box score of the 1900 Philadelphia Phillies.

The scorecard really intrigues me, as it is clearly marked "Entered by an Act of Congress in 1877". From my limited research capabilities, I know that Spalding issued the first scorecards and record books in 1877. However, I have been unable to find an example of a scorecard from that period. I'm assuming it is possible this scorecard was issued in 1877 but wasn't used until this game was played in 1900 or 1901. The scorecard is on very thin paper stock and may have been in one of the record books from Spalding.

The second thing that intrigues me is the game. It evidently featured the 1900 or 1901 Philadelphia Phillies as it contains the following players that were member of the Phillies during that period; Elmer Flick, Ed Delahanty, Joe Dolan, Jimmy Slagle, Harry Wolverton, and Al Worth. The problem is that it also lists Bones Ely who was playing for the Athletics and a gentleman named Sheig as the catcher. Bones Ely is understandable because he was in Philadelphia also, although with the Athletics but there is somewhat of a link. Sheig I have no idea.

McGuire was playing for the Superbras from 1899-1901. This could mean the game was between the Phillies and Superbras due to the scorecard containing the autograph of McGuire.

I don't specialize in pre-war as my interests lie with post war pre 1970. So I'm requesting assistance on what the forum thinks. I'm especially interested to hear from scorecard experts that may have an opinion if this scorecard is an original from 1877.

Thanks to everyone in advance.