Uncommon Dodger Team Issued Postcards Drysdale & Dodger Stadium/Scully
 

I've not seem another copy of either of these postcards. There should be more of the Dodger Stadium/Scully cards, it's postmarked 1977. The Crocker Drysdale may be one of a kind, possibly a test card of some type, it has a Clem Labine back. The regular issued of Drysdale from this set pictures him starting his wind up.

Maybe the announcer cards were made exclusively for the announcers to give out? Yours appears to have come directly from Scully. I know sometimes those types of items that are specific to teams, shows/events, players, etc seem to be that much harder to find. I have not seen that one before either.