The two pony mold types were first formally identified by Brent Burger in a December 1980 Crown Jewels article on California glass. Displayed here from left to right: RT (round top) C.G.I.Co., PT (point top) C.G.I.Co. RT California, PT California.
Note that the PT mold type has a distinctive tit of glass on the dome.
Back to the 2005 National Combined California Display [id=147003709]