Every time Tokheim came out with a new product they created what they called a "Bulletin." I have over 500 original Tokheim Bulletins.
The earliest Bulletin showing this unit is Bulletin 204 and the unit is Cut 330 (dated March, 1924). This Bulletin was made up for Gulf as the picture shows the unit in Gulf colors, but it shows the unit having four wheels on the bottom.
Now Bulletin 205, the next Bulletin shows the exact same unit, but in a green generic color, it is dated again March, 1924. In other words, the same unit that had a Bulletin directed to the Gulf distributors, was offered to anyone who wanted to buy one. The thing about this is that it was also called the Cut 330.
For some reason, in 1925 Tokheim again came out with Bulletin 216, again the Cut 340 in Gulf colors. Again with four wheels.
In Bulletin 225 (February, 1926), Tokheim now shows the unit with three tanks, it was the Cut 353 and the color was the generic color, green.
In August, 1926 ,(Bulletin 233) the 3 tank unit is now shown in Gulf Colors, now called the Cut 440.
In another Bulletin, also called the 233 (August, 1926) the three tank unit is shown in generic green, with wheels.
Now in September, 1926, the Cut 423 shows up. It is a two tank unit, on wheels and shown in generic green colors, it is Bulletin 234.
According to my Bulletins, the 423 was the last dispenser offered by Tokheim with the glass cylinders.
No piece of Tokheim literature shows any of these units with toppers, these were attached by the oil companies, not by Tokheim.
I apologize for putting this information is a post where you are trying to sell an item. I only posted this information because I have seen these units come up for discussion and very little correct information is offered. I suggest each of you collectors start a loose leaf where you post this type of information. I do not intend to write a book on oil dispensers as I don't think it would sell enough copies to cover the cost of printing, so this post might be the closest information on these cylinder top oil dispenser you might find.
Again, I apologize, nice unit, especially with the original glass cylinders.