Hi Joe's Mom---
You can purchase a William's Tru-Blast II horn/bell kit---item # 00245 ($43.95 from William's). The horn & bell give, IMO, very good realistic sounds. It's an EZ install for someone even w/ minimal skills.
Can't help you on the age of your son's SD-90. It's probably pre Bachman since the cab number is different than the current WbB SD-90.
Good luck--I'm sure your son will enjoy this loco for years to come .
Regards,
GTBob
You can purchase a William's Tru-Blast II horn/bell kit---item # 00245 ($43.95 from William's). The horn & bell give, IMO, very good realistic sounds. It's an EZ install for someone even w/ minimal skills.
Can't help you on the age of your son's SD-90. It's probably pre Bachman since the cab number is different than the current WbB SD-90.
Good luck--I'm sure your son will enjoy this loco for years to come .
Regards,
GTBob