Looking at the handwriting for reel 1, it appears that the transmission session number is rather 709, not 109.

Note, that the handwriting for the second reel shows the session 509 in March of the same year. The "first" reel dates the session in May.

P.S. Hard to judge about origins of the tapes, but by the looks, the reels seem more like some personal use dubs, not much an "official" storage. No reg numbers, names, very non-official.

Additionally, the edge remarks on the second reel mention that some parts were dubbed on "someone-else's" recorder. This is likely noted in case the head alignment needs adjustment for better read.