A good idea although the full-length gaiters weren't listed for the 850 Mk1 (or Mk2/2A), only the 061115 short (dust boot) 'gaiter'...
[URL unfurl="true"]https://andover-norton.co.uk/en/shop-drawing/225/roadholder-front-forks-steering-lock-steering-head-bearings[/URL]
...although one factory Mk2A road test bike did have long gaiters so perhaps they were optional by that time...
...and certainly were (according to the market?) on the Mk3.
Mud flaps were not listed for the 850 Mk1...
[URL unfurl="true"]https://andover-norton.co.uk/en/shop-drawing/82/rear-fender-tail-light-and-tail-section[/URL]
...but are for Mk2/2A:
[URL unfurl="true"]https://andover-norton.co.uk/en/shop-drawing/82/rear-fender-tail-light-and-tail-section[/URL]
[URL unfurl="true"]http://www.classicbike.biz/Norton/Brochures/1970/74NortonBrochure.pdf[/URL]
"...mudflaps on Interstate..."
("Interstate and Mk2 Roadster" according to the 2/2A parts supplement)
