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Leo et al I think that Jerry has provided the correct answer.
Pete
-----Original Message-----
From: jeralbin@aol.com [CBQ] <CBQ@yahoogroups.com> To: CBQ <CBQ@yahoogroups.com> Sent: Thu, Apr 23, 2015 10:21 am Subject: [CBQ] Re: Q Switch Marker Lamp with Amber lenses ? The Rock Island's South Chicago yard had them. An old switch tender in the 60's told me they used amber on yard switches as not to confuse main line engineers to think a switch was lined for a siding. I think a double track main line ran through the center of South Chicago yard. The Belt Line's Clearing yard had red/green markers. Regards...Jerry Albin
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