Για πολλά μοντέλα της seiko έχει καθιερωθεί να αναφέρονται με nicknames.
Seiko SNM011 / SNM009 aka
Samurai 
Seiko SNM015 aka
Black Ninja
Seiko SKX007 / SKX009 aka
007 / Pepsi
Seiko SKZ209 aka
Atlas
Seiko SKXA53 aka
Black Bullet
Seiko SHC057 / SHC0561 aka
Buzzsaw
Seiko SBBN011 aka
Darth Vader
Seiko SBDS001 aka
Flightmaster (Official Name)
Seiko SKXA49 / SKXA47 aka
Black Knight / White Knight
Seiko SBDX007 aka
Landmaster (Official Name)
Seiko SBDX001 aka
MarineMaster (Official Name)
Seiko SKX781 / SKX779 aka
Orange Monster / Black Monster
Seiko SNZF45 aka
Baby Monster
Seiko SBBN007 aka
Tuna 
Seiko SBDC003 / SBDC001 aka
Sumo
Seiko SNZF17 aka
Sea Urchin
Seiko SRP043 aka
Spork
Seiko SNKF11 aka
Big Freakin Seiko
Seiko 6138-0040 aka
Bullhead
Seiko 6138-3002 aka
Jumbo
Seiko 6138-8020 aka
Panda
Seiko 6138-0011 aka
UFO
Seiko SKZ255 aka
Frankenmonster
Seiko SBDC007 / SBDC009 aka
Shogun
Seiko 6309-7040 aka
Turtle
Seiko SNZH55aka
Seiko fifty fathoms
