The marksman model 740 is rated at 425 fps.
Contact the maker for a replacement manual
It will use any .177 caliber pellet
I own a Marksman Model 740 .177 pellet rifle. It has a wood-patterned plastic stock. It is a single shot rifle that folds in the middle for cocking. The safety auto-enables after every trigger pull. You must cock and reset the safety. Hope that helps.
There is a Model 740 - plastic stock, cocks by breaking the barrel handle and pressing down. Takes standard BBs which are loaded in mass through an opening in the top-back of the receiver.
The Marksman was made from the mid 70' to sometime in the 80's. Answers has no way of displaying photographs but I did a web search on "Markaman 740 air gun" and found several images of the rifle. It should not be hard to find them. It's a breal barrel rifle.
Impossible to answer without the sn or date codes.
the 740 is a very old model, they sell for $250- $350 in this area
Probably 740
The Marksman Model 740 .177 pellet rifle. It has a wood-patterned plastic stock. It is a single shot rifle that folds in the middle for cocking and loading. The safety auto-enables after every trigger pull. You must cock and reset the safety
It was intraduced in 1978. Read more at http://www.edmunds.com/bmw/7series/review.html
Check this table for the answer: http://www.remingtonsociety.com/rsa/questions/barrelcodes