Probably safety bar.
I wonder, can the comb be clipped up upside down to actually be a comb?
I agree. That's a very cool razor and accessory. Congrats.
Sounds good, I was wondering how it would have stayed on, and also how it wouldn't have killed the edge.No it cant, it wont click on to anything when i turn it upside down and try to attach it.
The 'comb' looks like the guard you see on Weck Sextoblades and such.
Okay... After a bit of surfing around I've come to a new conclusion. What you have there is a surgical instrument, namely a surgical prep razor. Which explains the guard, and the overall great condition of your find. Check this thread, towards the bottom is a razor with a similar type of guard and is obviously of medical origin. http://badgerandblade.com/vb/showthread.php/340835-Post-your-Pictures-Military-Straights