Smith & Wesson with Cut that allows you to see and understand the locking system and practice keyless opening.

https://articulo.mercadolibre.com.ar/MLA-1187062861-esposas-smith-wesson-_JM#position=45&search_layout=grid&type=item&tracking_id=8e3b7f81-d4ae-4bd8-bed4-cd2595b73786
Basic S and W Handcuff Probably a Model 100 is My Guess.
Howdy Amigos.
How is everybody today?
Can anybody please tell me if this Product is worthwhile? I'm just Curious.

Thank You Very Much!
Sincerely,
Ramiro Guerrero 

Model 100 is correct.
Cut out not done by the factory.
This is a factory cut-away
Dave

Thank You for taking your time and making the effort to help me and to correct my Post Amigo!

Sincerely,
Tejano Libre

There are a couple of options.

Option 1 - Expensive :

https://www.handcuffwarehouse.com/smith ... handcuffs/

Option 2 - Cheap

https://www.handcuffwarehouse.com/chica ... f-cutaway/