I don't know specifically 1935 or LH but from memory for 1936 the tap had two plungers, the main had a hexagon and the reserve was round and knurled. The Red Hunters had just a more conventional single plunger tap.
If you are looking on ebay or at jumbles be aware that the screw into the petrol tank is not always the same size so you need to check that. Also there are plenty of reproduction taps around which are of varied quality. The originals could be unscrewed easily to allow you to change the corks which is easily made in just a few minutes from a wine cork. The reproductions are often riveted together and it's more difficult to change the cork. If you buy ready made corks from autojumbles they are often too weedy in size and don't usually last for long. When re-assembling after a cork change you need to blow though the tap to see that it's working properly as the cork length when wrong can cause unexpected results.
The attached picture is a reproduction tap and is included to show the general form of the tap.
- tap.jpg (24.02 KiB) Viewed 288 times
1938 Ariel Red Hunter VH1
2011 Moto Guzzi V7 Cafe Classic
AOMCC Member 3400
Looking for a well sorted and original Black Ariel, 1928 OHV or 1930 OHV (or a nice Velocette)