Sound of my binger wristwatch ticking. I used phase cancellation to get rid of the noise floor except for the ticks. At lower volumes it sounds very convincing. I draped the watch over my microphone - the blue yeti pro.
Wind-up 1950s spartus timer ticking for approximately 100 seconds. Electro-voice bk-1 microphone, miked very close, on soft surface. Some ambient room noise.
A short loop of 12 seconds of a ticking wall clock. Recorded with a zoom h5 portable recorder and rode ntg-1 shotgun mic. I have used a filter and noise reduction to clean it up. The clock sounds quite plasticky.
An admittedly noisy recording of a timer ticking away. Recorded with the internal mic of a sansa clip mp3 player, held under some blankets and pillows in a vain attempt to shield some of the noise from the apartment.