Pertinant to recent discussion, here is one SLR coach with a 'X' and a inspection window as well. Seen with the Sanskriti Express visiting Khadki.

Date: 2010-11-10
Owner: Ashish Kuvelkar
Size:
Full size: 1024x768

Photo Properties
Summary  Details
Make Panasonic Model DMC-FZ28
Aperture Value f/7.1 Color Space sRGB
Exposure Program Program Flash No Flash
ISO 100 Metering Mode Multi-Segment
Shutter Speed Value 1/400 sec Digital Zoom Ratio 0
Date/Time 2010 Nov 10 10:41:25 +0000