Remington 1187 manuf date?

I loaned out my Blue book and can not look it up. It is PCXXXXXX. Anyone have a book they can look in?

Also I just installed a 21" slug barrel and the back site on the ramp was not tight (it fell off). Just to save a few slugs, if you have one, which of the 5 marks is your site sitting on the ramp, and at what range is it sighted in for? Thanks

The gene pool needs chlorine.