Ted, Yes this is an authentic recreation with flipup rear sight. The rear sight is also correct, with a notch and a flip-up elevator sight. Great article at:======thetruthaboutguns.com/cimarron-firearms-uberti-1860-henry-in-45lc/

Ted, yes Sir, it does have the flip up long range sight. The Civilian Model. is a reproduction of the original Military Rifle. Henry Customer Service should be able to shed some light on this at 1877 SIXGUN1. ------ cimarron-firearms.com/1860-henry-civilian-45-lc-24-barrel.html

no it does not have the flip up sight then civilian just means that it is a copy of the 1860 henry sold on the civilian market after the war UPC:
814230010278
Description:
CIM 1860 HENRY LVR 45LC 24B
Brand:
Cimarron
Model:
Civilian
Type:
Rifle: Lever Action
Caliber:
45LC
Finish:
Blue
Action:
Lever
Stock:
Walnut Straight Grip
Sight:
Front: Blade Rear: Adjustable
Barrel Length:
24
Overall Length:
43
Weight:
8 lbs
Capacity:
10
Receiver:
Brass
Butt Plate:
Brass Buttplate
Features:
Octagonal Barrel;
Made by Uberti-Italy