Just dug out my Yeadon A4 volume. Apologies if I don't know the correct terminology, but I'm assuming you mean the high fairings that were applied to the tender. There are pics of both the high side and cut down versions.The tenders they listed as having the fairings were 5323-5332 and the work was done in 1936. It then goes on to say the design was modified as high winds had an adverse effect, so these 10 tenders were cut down between Dec '37 and Feb '38.
The tenders listed for 60034 were as follows
5639 1/7/38 - 22/4/39
5642 9/6/39 - 24/1/48
5332 25/2/48 - 28/5/54
5325 28/5/54 - 14/1/63
5640 28/1/63 - 28/4/66
5329 24/8/66 - 3/12/66 (scrapped)
So on that basis, the cut down tender 5325 would be fine until '63.
Edit: Reminder to self. Read the whole thread before answering a question. Apologies Gilbert, it appears you already had this info....