Some way to the north of Si Racha is Chonburi. An article in the Continental Railway Journal (in 1996) suggests that the Srimaharacha Timber Company may have had a northern outpost at Nongchak near here, which may have worked in some way with the Chonburi Sugar Mill. The latter is known to have had four Henschel 0-6-0T of the same vintage (and number series) as 15 and 16 at Si Racha. At some stage the track was pulled up and rail working abandoned. There are two (extra) unidentified Henschel locomotives at the dump at Si Racha, probably from here.

105 (29582/1956) was subsequently bought for preservation in the UK where it is now 105 SIAM on the Bredgar and Wormshill Railway. 106 was also brought to the UK but no further details are known. 103 (25427/1956) and 104 (29583/1956) were taken to Queensland, Australia.