On 11/07/2012 03:10 PM, Fred Cisin wrote:
  Teac "Mini Flexible Disk Drive Specification :
FD55A, FD55B, FD-55E,
 FD-55F, FD-55G"   [what would the FD-55C and FD-55D be?]
 Xerographic copy.  Comb (GNC) binding 
FD-55C (FH, SS 96tpi)  -55D (FH, DS, 96tpi).  You'd occasionally see
them retrofitted on Apple II setups.
  Weltec:
 "Product Reference Manual : 5 1/4 Inch Half High Flexible Disk Drive :
 Models M16-A/M16-R"  1984 
Betcha that Al K. would like that one for Bitsavers.  A unique and
utterly forgettable piece of PC history.  Amiga did a similar thing on
their systems for 3.5 HD floppies (i.e. not raise the bridge, but
lowered the water).
--Chuck