[thetahat]

Here are a couple other versions of the ebay pennant, note the similar stitching and the use of blue threading on the back (which should be red). The third link is to an authentic '55. Can also see a difference with respect to the placement of the year.

https://auction.lelands.com/bids/bidplace?itemid=88844

https://www.josportsinc.com/products...mpions-pennant

https://www.ebay.com/itm/16566251892...4AAOSwOY1jF3j1