Store › NOS Lucas Triumph TR4-TR6 Dimmer Switch RTC 432A Image 1 of 6 Image 2 of 6 Image 3 of 6 Image 4 of 6 Image 5 of 6 Image 6 of 6 NOS Lucas Triumph TR4-TR6 Dimmer Switch RTC 432A $30.00 New old stock. Triumph TR4, TR4A, TR5, TR250, TR6.SKU 3330 Add To Cart Added! New old stock. Triumph TR4, TR4A, TR5, TR250, TR6.SKU 3330