Gee, seems like you guys have it sorted ... my guess on looking at the phot= o was rotors for an enigma machine .... :) > -----Original Message----- > From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf > Of graham foulkes > Sent: 30 May 2017 09:06 > To: Microcontroller discussion list - Public. > Subject: Re: [OT]:: What are these mystery objects >=20 > Back to the objects..... > Look like plastic extrusion nozzles, although the center hole and the plu= gs > indicate pipe extrusion, the peripheral holes suggest an overwrap of som= e > sort. Would be nice to see back plate. Milling index heads usually have a > spiral hole pattern. Clock makers, if any still exsist in this digital ag= e also have > specialized jig plates and indexers of same ilk. >=20 > On May 30, 2017 2:59 AM, "Trevor" wrote: >=20 > > Sean Breheny wrote on 30/05/2017 15:52: > > > Hmmm - but 9FY and 9FF do not occur in that document. 9FG does, but > > > it has to do with a sealed DB9 connector, not the item that looks > > > like the mystery disks. > > > > Indeed, I call it serendipity as the cover for the chapter showed more > > or less the item under discussion as soon as I opened it :) > > -- > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > View/change your membership options at > > http://mailman.mit.edu/mailman/listinfo/piclist > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .