In December of 1962 Gottlieb manufactured Rack a Ball which was the first wedge head with this playfield design layout. Then in July of 1964 Gottlieb manufactured Bowling Queen which has the identical playfield design layout as Rack a Ball. Then the last wedge head to get this identical playfield design layout was Mibs in September of 1969.
Most collectors lean towards the Bowling Queen first to add to their wedge head line up and Rack a Ball second. Last in line is Mibs which sometimes gets a bad rap because of the artwork isn't as nice as the other two wedge heads.
I personally like and have Mibs in my collection because it's a game I distinctively remember playing in the candy store 50 feet from my house back in 1969 when it first came out. Also the scoring with the 100 point gong bell is very sharp and loud when it gets stuck with that metal plunger 5 times for 5000 points.
Lets face it, with the same playfield design layout on all three wedge heads playability is the identical. Its for sure is a unusual or different designed playfield layout and not the normal from that era, but because of that playability wise its enjoyable, for me that is.
I remember the vendor bring this game into the candy store for the first time and setting it for us pinheads to play. The first thing we learned about this game was the player only needed to hit the three stand up targets on the playfield to light SPECIALS, which alternated at the four side outs. When we found this out it became a huge lure into wanting play this game all the time, since most other wedge heads require a more full- length sequence to reach Specials when lit.
Mopar....I know your more an Add a Ball guy, but I thought I would explain in detail about these three SPECIAL when lit Gottlieb wedge heads. It would have been cool if Gottlieb made an Add a Ball with this play field design layout for sure.
The first link below view my MIBS game play and instruction video on my you tube page. The other link you will find other wedge head game play videos too.