It hasn't been cleaned yet. After balancing (hopefully it will ever end!) I want to do another normal release, and then start kicking things.
There were horses for some time, but I can't remember if that was even version with numbers. If you are interested, I'll put the sources somewhere (that author did agree with license) and you can have some fun 
What Dirk said is true: before 1930, nothing is guaranteed. That said, shifting date back for depot does not certainly hurt, either.
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Just wait a minute - what are you saying? The dates are different:
# 04.07.2008 change FrankP
# - add type and waytype ; Simutrans 0.100.0 / makeobj 49
#
#
#-------------------------------------------------------------------------------
#
# Depots
#
#-------------------------------------------------------------------------------
Obj=building
Name=TrainDepot
copyright=MHz
type=depot
waytype=track
# must be 1*1
Dims=1,1,4
NoInfo=1
intro_year = 1810
icon=> ../images/player-depot-rail_2-128.1.2
cursor=../images/player-depot-rail_2-128.1.3
FrontImage[0][0][0][0][0][0]=../images/player-depot-rail_2-128.0.0
FrontImage[1][0][0][0][0][0]=../images/player-depot-rail_2-128.0.1
FrontImage[2][0][0][0][0][0]=../images/player-depot-rail_2-128.0.2
FrontImage[3][0][0][0][0][0]=../images/player-depot-rail_2-128.0.3
BackImage[0][0][0][0][0][0]=../images/player-depot-rail_2-128.1.0
BackImage[1][0][0][0][0][0]=../images/player-depot-rail_2-128.1.1
#BackImage[2][0][0][0][0][0]=../images/player-depot-rail_2-128.1.2
#BackImage[3][0][0][0][0][0]=../images/player-depot-rail_2-128.1.3
--------------------------------------------------------------------------------
Obj=building
Name=TramDepot
copyright=MHz
type=depot
waytype=tram_track
# must be 1*1
Dims=1,1,4
NoInfo=1
intro_year = 1852
intro_month = 1
icon=> ../images/player-depot-tram_0-128.1.1
cursor=../images/player-depot-tram_0-128.1.2
FrontImage[0][0][0][0][0][0]=../images/player-depot-tram_0-128.0.0
BackImage[0][0][0][0][0][0]=../images/player-depot-tram_0-128.1.0
FrontImage[1][0][0][0][0][0]=../images/player-depot-tram_0-128.0.3
BackImage[1][0][0][0][0][0]=../images/player-depot-tram_0-128.1.3
FrontImage[2][0][0][0][0][0]=../images/player-depot-tram_0-128.0.2
FrontImage[3][0][0][0][0][0]=../images/player-depot-tram_0-128.0.1
--------------------------------------------------------------------------------
Obj=building
Name=CarDepot
copyright=MHz
type=depot
waytype=road
intro_year = 1887
# must be 1*1
Dims=1,1,4
NoInfo=1
icon=> ../images/player-depot-road-128.1.2
cursor=../images/player-depot-road-128.1.3
FrontImage[0][0][0][0][0][0]=../images/player-depot-road-128.0.0
#BackImage[0][0][0][0][0][0]=../images/player-depot-road-128.1.0
FrontImage[1][0][0][0][0][0]=../images/player-depot-road-128.0.1
#BackImage[1][0][0][0][0][0]=../images/player-depot-road-128.1.1
FrontImage[2][0][0][0][0][0]=../images/player-depot-road-128.0.2
FrontImage[3][0][0][0][0][0]=../images/player-depot-road-128.0.3
--------------------------------------------------------------------------------
# EOF