Monitor 'High Speed' Picnic No1 (1954), with box, instructions and original receipt. Includes comparison between pre-1950 model and 1954 model. Part 1 of 2. On the side of the box, written in ink is "AO 11/6/54 46/10". Then there is a square stamp with "752" in the centre. No idea what the "AO" means. "11/6/54" is probably the date the stove was taken into stock by the retailer and is written in the UK format - 11 June 1954. "46/10" is the price in old pre-decimal UK currency - 46 Shillings and 10 Pence (20 Shillings equalled one Pound so it is 2 Pounds 6 Shillings and 10 Pence). In today's value, it converts to £45.60 using the UK Retail Price Index or £115.00 using UK average earnings. The stamp "752" is probably a manufacturers batch number : The instruction sheet is dated 2.52. It has a sticker on the front stating "IMPORTANT A kettle or some other utensil should be placed on the grid of the Container during the initial lighting of the stove". I can only imagine that there were reports of the stove not pre-heating properly, and these added instructions were an attempt to raise the temperature inside the case during priming: A card receipt with the stove is from "E.K WILSON Ironmongers, Hardware, Builders Merchants and Electrical Suppliers. 82-87 Old Brompton Road, S.W.7 TELEPHONE KEN 0046" Overprinted onto the card by a cash register is "SEP-6 2-6-10 82 7455 00" then printed "AMOUNT SHOWN ABOVE WITH THANKS". "SEP-6" will be the date with no year. "2-6-10" is the amount paid (2 Pounds 6 Shillings and 10 Pence). The "82" is on it's side and may be the cash register number. "7455 00" is probably the receipt number: My guess is that the stove was made in the early part of 1954. EK Wilson still exists but now only occupies No 86 Old Brompton Road. Kensington, London. The stove retains around 99% of it's lacquer finish and appears unfired. There is no fuel smell in the tank. I have not polished anything, just a rinse in soapy water to remove dust. Although the top of the lipstick burner is darkened, I think that this is probably from a manufacturers test firing of the burner: The case is the standard design aluminium one and the pot supports show no signs of use. The case has retained it's shine due to the storage in it's original box: The jet prickers are both marked "No1 Picnic": There are a number of differences between the pre-1950 version and this 1954 version (in the following comparison images, the pre-1950 is on the left and the 1954 is on the right): The Bell: In 1950, Monitor introduced and patented a split in the collar of the burner bell. The patent ( Link ) states "The slits….. give a certain amount of resilience to the collar or sleeve so that there is no risk of it jamming on the burner tube and the stove can be readily dismantled into it's component parts for packing after use.": There is a ridge inside the collar of the pre-1950 bell, but the 1954 has a 'smooth bore': The ridge in the upper part of the bell is more defined on the later model: The Flame Plate: On the pre-1950 the flame plate is steel (cast iron?), marked "British Monitor Made" and sits on top of the bell. On the 1954, the flame plate is unmarked brass and is fixed to the bell with four lugs: The Pump collar: The pump collar on the pre-1950 is a male threaded machined piece of brass. On the 1954 it is a standard style female collar: Continued in Part Two.