Clarify
In 1858 it had not been invented, so the cost was zero.
Ford Escorts use an inline 4 cylinder overhead cam engine, not a rotary engine.
Unfortunately, the answer to that question is difficult to come by without knowing the location and use of the rotary couplings. The answer could be anywhere from $200-$2000. Please specify use for rotary couplings.
Mechanics in NZ who work on Rotaries are currently on holiday.
Rotary actuators average around $100 to replace. They are important because they move the read/write head to the proper data track.
1448 is an integer.
The number 1448 is "one thousand four hundred forty-eight." The year 1448 would be spoken "fourteen forty-eight."
How much is l8227/760313199 rotary watch worth
Post a new question after you look at the date again. A 1448 U.S. quarter?
A white rotary sewing machine from the 1900s is worth about $130.
A rotary converter, which converts AC electricity to DC electricity is a largely obselete technology. However you can still buy them in a wide range of sizes. The cost depends upon their size and capacity. A small 5 hp device would cost around 400$. A 25 hp rotary converter costs around 2800$ and they go up from there.
http://auto.howstuffworks.com/rotary-engine.htm this is a pretty good site pretty much explaines everything