Re: Agitator:
Hi! Rodrigo, that is the main Agitator. If the Washer had both Agitator's, it would have a Latch to Lock and Unlock the outer main Agitator, to lift off of the Hand-Wash Agitator. The Hand-Wash Agitator has only some small curved Fins/Vanes on the lower part of it and I believe going up only part of the Shaft part of the Agitator. I hope that this helps you.
I used to have a 1990's Hotpoint Washer with Matching Electric Dryer and it had both Agitators. It also had the Self-Clean Filter Ring/Close Guard, as yours has at the top of the Tub.
I hope to locate another Hotpoint Washer similar to mine sometime. I'm guessing since it was somewhat newer, that most 2nd Hand Appliance Shops/Stores will no doubt have some available.
Peace and great Laundring with your Hotpoint Washer, Steve
SactoTeddyBear...