Southwest Air Lines  (SWAL) triple set  in 1/400 by Gemini Jets. 
Hard to find  triple set by Gemini jets especially for Japanese market. Limited edition of 1000 pieces. 
Diecast model.
 
Set consists of 
YS-11A JA8794
B737-200 JA8443 
B767-300  JA8267
 
Brand new set in mint condition, box may have some visible wear and tear as its been in long term storage.
 
Please note: This is not a toy and is intended for serious collectors aged 14+