Joystick identification

I have acquired a Pericom Joystick 11, helping an acquaintance clear out his attic before he emigrated. It's an analogue joystick with a tiny red "fire" button on the tip of the stick, in a large, solid metal case. No other buttons. It has an attached coiled data cable with a 5-pin DIN plug on the end. I thought it was a BBC Micro analogue stick, something like a Bitstik: http://acorn.chriswhy.co.uk/8bit_Upgrades/Acorn_BitStik.html However, I've sold all 5 of my BBC Micros to Dave Moore of Replay Events - http://www.replayevents.com/ He's a bit of an Acorn expert and said this wasn't a BBC Micro device and it's not a BBC Micro connector. Wrong kind of DIN plug. On the label on the base, it says: Pericom Manufacturer of Micro Computers Graphic Terminals and VDUs Pericom PLC Rockingham Drive Linford Wood, Milton Keynes MK14 6LH Telephone (0908) 670000 Telex 826442 Model No. JOYSTICK 11 Ser. No. J. S. 774 In theory, you should be able to see a photo of it here: https://www.dropbox.com/s/ce2py6bjfvcrsqh/Pericom_joystick_11.jpg Anyone know what it is, what it's from or if it's of any interest to anyone? -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Tel: +44 20-8685-0498 ? Cell: +44 7939-087884