Looking thru many adds and video's it looks as though there was a transition in where these plates went from black bottom to to white with arrows. Probably just before it went from slider bar to the roller sale marker.
Still digging on the date, also there was a small spinner version I haven't nailed down yet.

IMG_0062[3104].JPGsun ad 6.jpgsun ad 2.jpgIMG_20200926_192608516.jpg
Last edited by farmboy70; Sun Sep 27 2020 07:21 AM.