The quickest and easiest way to determine the mold and style of an Innova mini is to first look at the bottom tooling. If the tooling reads:
Tooling....................................... Mold................ Style

San Marino................................. Aero............ SMAero
None............................................ Aero............. NTAero
Ontario (Aero Top).................... Aero............... OAero
Ontario (Aviar Top).................... Aviar
INNOVADISCS (Aero Top)...... Mini Driver
INNOVADISCS (Aviar Top)...... Aviar Driver

To further identify the mini, you can look at the photographic comparisons of the different top and bottom configurations. Those combinations are as follows:
Aero Top, Aero Bottom = Aero
Aviar Top, Aero Bottom = Aviar
Aero Top, Driver Bottom = Mini Driver
Aviar Top, Driver Bottom = Aviar Driver

If the hot stamp has a date reference, another way to help identify the mold is by using the dates the mini molds were produced:
Aero = 1986-2006
Aviar = 2003-2006
Mini Driver = 2007-2009
Aviar Driver = 2009-Present
Below are examples of what a descriptor might look like for the various molds of Innova minis. The Plastic Type element is really used to show if a mini is Standard (non-golf weight) Golf weight, Star or Champion plastic. Currently we use the Disc Color element to describe UV or Glow. Not all minis have styles. Please see "Identifying Innova Minis" for detailed photos that show the differences and go to the Flying Disc Museum FB page, under the files section for a spreadsheet on the timeline details of the Innova mini.

EXAMPLES OF VARIOUS DESCRIPTORS

Descriptor for San Marino tooling
Maker: Innova-Champion
Model: Mini
Style: SMAero
Mold: Aero
Plastic Type: Standard
Size: 3.9 inches
Disc Color: Blue
Lettering/Hot Stamp: Innova Champion Disc Inc; PDGA Approved—Diffraction Gold
Label/Sticker:
Date Introduced: 1986
Number Produced:
Period of Manufacture: 1986-1991
Special Notes: This is a first run Innova mini. The first run featured a wide single inner band. Because of the width of the band, they were experiencing too many hot stamp drop outs (rejects) so they replaced the wide ring with two narrow rings for the second run.
Contributor(s):

Descriptor for Ontario Tooling
Maker: Innova-Champion
Model: Mini
Style: OAero
Mold: Aero
Plastic Type: Standard
Size: 3.9 inches
Disc Color: Glow
Lettering/Hot Stamp: Disc Golf® Official Marker Miniaero; Innova Champion Disc; JPDGA Approved Champion Disc; Made in USA; © Hero Kobo 1993; #1—Blue
Label/Sticker:
Date Introduced: 1993
Number Produced:
Period of Manufacture: 1991-2006
Special Notes: Made for Hero Disc in Japan. The little disc golfer on stamp top center is Sam Ferrans.
Contributor(s):

Descriptor for Ontario Tooling, golf weight
Maker: Innova-Champion
Model: Mini
Style: OAero
Mold: Aero
Plastic type: Golf weight
Size: 3.9 inches
Disc Color: Blue
Lettering/Hot Stamp: Innova Champion Discs; Bar Stamp—Yellow
Label/Sticker:
Date Introduced:
Number Produced:
Period of Manufacture: 1991-2006
Special Notes:
Contributor(s): Mike Hughes

Descriptor for Aviar, Ontario Tooling
Maker: Innova-Champion
Model: Mini
Style:
Mold: Aviar
Plastic Type: Champion
Size: 3.9 inches
Disc Color: I-Dye
Lettering/Hot Stamp: Aviar™ Champion Mini; First Run—Metallic Rainbow
Label/Sticker:
Date Introduced: 2003
Number Produced:
Period of Manufacture: 2003-2006
Special Notes: These minis are known as "Grid Minis". Weigh 32 grams
Contributor(s): Mike Hughes

Descriptor for Mini Driver
Maker: Innova-Champion
Model: Mini
Style:
Mold: Mini Driver
Plastic Type: Golf weight
Size: 3.9 inches
Disc Color: White
Lettering/Hot Stamp: Innova Mini Driver; innovadiscs.com—Metallic Green
Label/Sticker:
Date Introduced: 2007
Number Produced:
Period of Manufacture: 2007-2009
Special Notes:
Contributor(s): Mike Hughes

Descriptor for Aviar Driver
Maker: Innova-Champion
Model: Mini
Style:
Mold: Aviar Driver
Plastic Type: Golf weight
Size: 3.9 inches
Disc Color: Light Blue
Lettering/Hot Stamp: Mini Driver; Innova Disc Golf logo; www.innovadiscs.com—Metallic Purple
Label/Sticker:
Date Introduced:
Number Produced:
Period of Manufacture: 2009-present
Special Notes:
Contributor(s):

Descriptor for Swirly
Maker: Innova-Champion
Model: Mini
Style: Swirly
Mold: Aviar Driver
Plastic Type: Standard
Size: 3.9 inches
Disc Color: Pink Swirl
Lettering/Hot Stamp: Innova Swirly Mini—Black
Label/Sticker:
Date Introduced: 2015
Number Produced:
Period of Manufacture: 2015-present
Special Notes:
Contributor(s):

Descriptor for Galactic
Maker: Innova-Champion
Model: Mini
Style: Galactic
Mold: Aviar Driver
Plastic Type: Standard
Size: 3.9 inches
Disc Color: Yellow, Orange, Red swirl
Lettering/Hot Stamp: Galactic Mini; Innova Disc Golf—Metallic Red
Label/Sticker:
Date Introduced: 2019
Number Produced:
Period of Manufacture: 2019-present
Special Notes:
Contributor(s):