Too many to list (add yours in the comments below!)
The ETA caliber 2824-2 is perhaps one of the most well-known and most recognized movements in the watch industry. It has been in production since 1982 and was based off of the original Eterna caliber 1427. The “-2” designation indicates the generation.
The ETA caliber 2824-2 is supplied to many different watch companies for use in a wide variety of watches. These companies will often put their own branding on the rotor, or make other small changes. This sometimes leads them to creating their own caliber number.
Before the watch industry’s rush to produce and market in-house movements, some watch companies would create their own caliber number to disguise the fact that their watch was using the ETA 2824-2. This isn’t because the 2824-2 was less desirable movement, but rather because much of the watch industry was smoke and mirrors, and also in an effort to create higher prices in the market since nobody knew the cost of the parts within the watches.
Click here for more examples of 2824-2 movements that are branded under different caliber numbers.
Since the patent giving exclusive rights to ETA for the design of the 2824-2 expired, there have been similar movements aka “clones” popping up that are based on this movement: For example the Sellita caliber SW200, STP1-11, Valanvron VAL-24, Hangzhou caliber 6300, Seagull caliber ST2130.