Nice tap handle ball knob from Effinger Beer, Baraboo, Wis. Embossed on back: Robbins Attleboro Mass. Face: Effinger Beer, The Effinger Co Baraboo, Wis. The item “Vintage THE EFFINGER CO. BEER BALL KNOB TAP HANDLEBARABOO, WIS. DRAFT” is in sale since Monday, May 02, 2016. This item is in the category “Collectibles\Breweriana, Beer\Tap Handles, Knobs\Other … more