In KRFM's COILFIL, there is "Old T&R service" that TLT ( Toshiba Lighting & Technology Corporation 
and also NSD ) are shipping, assuring the performance, which is equivalent
to the old choke coil product, same model name as T&R ( old model name ).
This service is only available to those special customers ( persons ) who directly send their applications 
to KRFM either by  fax or 
e-mail.
This service started on January 2003 when Our Patent for this COILFIL
( COILFIL ) registered.
Old Model Name (P.N.) RF Choke Coil (COILFIL) Article Comparison Graph.
| 
       TLT's Old P.N.  | 
      
       NSD's Old P.N.  | 
      Remarks | |
| 
       601 systems  | 
      - | 601-09-4 | With Core material | 
| 601-10-4 | With Core material | ||
| 
       602 systems  | 
      602-10 | - | Without Core Material | 
| 602-12 | 602-10-2 | With Core material | |
| - | 602-13-4 | With Core material | |
| - | 602-17-2 | With Core material | |
| 
       332 systems  | 
      332-10 | - | Without Core Material | 
| 332-12 | 332-10-2 | With Core material |