81 and 82
These two models are chambered for the .32 ACP cartridge. The 81 has a double stacked magazine with 12 round capacity, while the 82 has a single stacked magazine with nine round capacity and resultant thinner grips.
83, 84 and 85
These models are chambered for the .380 ACP (9 mm Short) cartridge. The 84 has a double stacked magazine with 13 round capacity, while the 83 and 85 have a single stacked magazine with seven and eight round capacity respectively, and resultant thinner grips. The 84 and 85 have a 3.81" barrel, while the 83 has a 4" barrel.
The model 86 is chambered for the .380 ACP (9 mm Short) cartridge, but differs significantly from other models in the series, because it has a redesigned front end with a tip-up barrel that hinges at the muzzle to open the breech. This allows the shooter to load a cartridge directly into the chamber and not have to operate the slide.
There are two distinct 87 models both chambered for .22 LR. The standard model is similar to other models, but the 87 Target has a longer barrel and slide, can accept optical sights, and is single action only.
The model 89 is also chambered for the .22 LR and is designed for competition and range training, with a lightweight frame and ergonomic grips.