Trad = Traditional Line: Basic model, no extra details, mostly unnumbered, all without sound, all powered units have 8 pin plugs for easy DCC installations
Exec = Executive Line: Ready to Run, super detailed, numbered, with DCC and Sound or Analog (DC).
DCC and Sound version features ESU LokSound V5 Decoder. Analog (DC) version has 21 pin socket for DCC module.
Bowser does not recommend LOK sound locos for use on DC layouts.

DCC non sound recommended decoder for
Current Production (21 pin socket)
ESU #59629

or

TCS #EU-821 8 function decoder

Production w/8 pin sockets (old production)
NCE #D13SRP and D15SRP, Digitrax #DH123PS and DH163PS, TCS #T-1A

Add sound to a non sound small Baldwin loco: #691-1232 - for 21 pin socket locos

Add sound to a non sound small Baldwin loco: #691-1229 - for 8 pin socket locos
Click here for instructions

You must send us your die cast frame (not chassis) first before I send you a machined frame.
For 8 pin socket locos only
#691-1230 Die Cast Frame Trade for VO-1000 $7.00 each
#691-1231 Die Cast Frame Trade for VO-660, S8 & S12, DS4-4-1000 $7.00 each

Click here for instructions