I don't know how it was in 1934 but when I was in the parts Dept (1950-1977) we got what was called an initial order of parts and accessories for the up-coming new model. The amount of accessories was based on the average number of new cars the dealer sold in a year. Say like 0 to 100 cars 100 to 200, etc. Our dealership was like 1000 new cars and trucks a year. It may start off with say 50 of the Deluxe Air Flow heaters, 25 push button radios.20 manual radios, 15 accessory hood ornaments, 20 sets of bumper guards, and on and on.
There would be enough to get the year started. Some of the accessories would be dogs such as new items they were itroducing and no one wanted like vacuum operated ash trays and automatic convertible top lowering devices. Some of these items would be considered very desireable today. Also through the year you could order what ever you needed. At times heaters and radios could be ordered in large car load quantites for a better price. It got hairy at the end of the year because you didn't want a lot of accessories left over that were difficult to get rid of.
Installing a lot of accessories on a new car was not usually done until the car was sold and the owner selected what he wanted. Some buyers would settle for a manual tuned radio because they wanted to save a few dollars or didn't even want a radio.
The 1934 cigar lighters were not really that rare. Many owners smoked back then and $1.50 for a lighter wasn't to bad if you could afford a new car.
I had/have this subject on my article for the GD list but never find time to do all the articles I have lined up because I spend too much time on the chat site.....such a problem