The same way you would clean any Marlin lever action rifle. These models are of the same design of a Marlin 30-30.
The phone number of the Western Branch is: 740-493-1745.
I WAS TALKING TO A PAWN SHOP DEALER THIS WEEK AND HE SAID THAT THEY WERE IN THE 70'S. HE HAD A NICE LOOKING ONE FOR $199.00
I recently bought a late 60's Western Field Model 740-A-EMN in mint condition for $275. The rifle was manufactured by Marlin with slight modification of their Model 336 there a few cosmetic differences in particular the sites. Otherwise the operation mechanism seems identical.
A Westernfield model 740 is a Marlin model 336. For parts, try: Numrich gunpartscorp.com Jack First jackfirstgun.com Bob's Gun Shop gun-parts.com
While I cannot give you a age for your rifle,I can say that the Western Field(Montgomery Wards) model 740A was made for Montgomery Wards by the Marlin firearms company.The Marlin model 336 and your rifle are one and the same.The value will be between 150-275 dollars depending on overall condition,and a good bore.
The Western Field model 740 was made for Montgomery Wards(western field) by Marlin.The marlin model 336 and your rifle are one and the same.The serial number letter prefix of AB indicate that your rifle was made in the year 1966.Being that this rifle is a Marlin model 336 you may find a stock all most anywhere.You can try E-bay,gunbroker.com,or go to Numrich Gun Parts Corp.All of these sights should have what you need.As to the value,these well made lever action rifles will bring between 200-300 dollars in the condition that you describe.
20% of 740 is 148. 20% OUT of 740 would be 592.
100% = 740 10% = 74 5% = 37 740 - 74 - 37 = 740 - 111 = 629
740 K could mean: 740,000 (number: the "k" stands for "thousand") 740 degrees k (temperature) 740 * k (in maths, to multiply 740 and k together)
Replace bulb with correct type and check contacts inside of the socket and clean if needed.
740 is composite.
740 yards = 0.4205 mile or Zero miles and 740 yards.