description (presumption)
  1985
- the earlymobile (gary helfrich, 05.11.2014 : First titanium bike sold (by me). Price was $105, or just enough to buy some more materials. The picture is fairly recent, so some parts are new, but the bike has been ridden by the original owner for the last 29 years.)
- headtube externally butted, for 1" forks.
- xy dropouts
- atom drum
   
  1986
one of  first titanium made frame at fat city cycles.
- headtube externally butted, for 1" forks.
- titanium fork?
- dropouts horizontal rear
   
1986
early titanium made frame at fat city cycles
- headtube externally butted not as extensive.
- dropouts horizontal rear
- chainstay u-brake
 
 
 
 
   
1987
mountain (catalog 1987?)
- dropouts horizontal rear

first 200 frames should have been marins. but some early frames would have merlin not marin stickers. marin was going to market all the frames, but they didn't buy as many as the promised, so merlin sold a few with merlin stickers (mostly to friends).
merlin made a few frames, then started to make batches of 30. 30 medium first, then 30 large, and 30 small.
1987
merlin marin titanium 4?
- dropouts horizontal rear
 
1987
merlin mountain 50

 
 
  1987
merlin mountain 80
- dropouts vertical front (new standard)
  1987
marin merlin mountain 90
- solid one-piece/3cable routing (new standard)
  1987
merlin titanium 100
- "chain control device".
 
 
  1987
merlin mountain 154
- constant headtube (new standard)
- constant bottom bracket (new standard), pressfit.
1987
merlin mountain 186, custom build
- bigger downtube, ovalized.
 
1988
merlin mountain 296
- seatstays u-brake
   
1988
merlin ti foon (prototype newsboy)
- round down- & toptubes, seatstays.
- separate internally downtube cable routing
 
1989
merlin mountain (catalog 1989)
1989
merlin monostay 288
- modified mountain frame
1989
merlin mongoose
- titanium front, steel rear
 
  1990
merlin salsa
1990
merlin elevator (prototype)
- standard diamond front, elevated chainstays.
- bigger down-, top- & seattube.
- custom dropouts
- machined seatpost area
 
1990
merlin elevator prototype
- elevated chainstays.
- downtube/chainstays. linear (new standard).
- bigger down-, top- & seattube.
- canti-brakes.
- titanium girder fork > combo with stem & bar
- custom dropouts
   
1990
merlin ashley, custom build
- geo for smaller people (prototype).
- bigger downtube
- headtube externally butted
- chainstays bended/welded (prototype, new standard 1992).
- seatstays ovalized
- canti brake seatstays (new standard).
 
 
   
1991
merlin mountain (catalog 1991)
   
1991
merlin elevator 4198
- elevated chainstays.
- downtube/chainstays. linear (new standard).
- bigger down-, top- & seattube.
- elevator/suspension dropouts (new standard)
- u-brakes.
  1991
merlin elevator 4276
- elevated chainstays
- downtube/chainstays linear.
- bigger down-, top- & seattube.
- canti-brakes (new standard).
   
1992
merlin suspension prototype 1
- downtube/chainstays. linear.
- no pivot.
- fork, stem & bar combo
 
1992
merlin suspension prototype 2
- downtube/chainstays. linear.
- pivot next to dropouts.
- standard fork
 
1993
merlin suspension
- standard diamond front, elevated chainstays.
- no pivot.
- flat flexible chainstays, round seatstays
- standard fork.
   
1993
merlin mountain 9187
- bended chainstays (s-bend, new standard, 1992)
- custom u-brakes
1993
merlin tandem custom
1994
merlin suspension prototype
- downtube/chainstays. linear. additional flat tube.
- no pivot.
- frame, fork, stem & bar combo.
 
1995
merlin xlm 001
- internally butted tubes (new standard xlm).
- headtube  for 1" forks.
1995
merlin newsboy
- round down- & toptubes, seatstays.
- headtube for 1 1/8" forks (new standard).
- internally downtube cable routing
- titanium machined seatpost binder (new standard).
- u-brake chainstays
   
1995
merlin newsboy
- custom truss fork & bar.
  1995
merlin newsboy n0006
- custom dropouts.
   
1997
merlin xlm 0884
- headtube  for 1 1/8" forks (new standard, 1995).
  1997
merlin newsboy 13519
- alloy seatpost clamp (new standard, 1997).