The Support Collection contains additional material and books which provide further details on railways in general.
| Museum Number | Object Type | Description | Image |
|---|---|---|---|
| TYWRM:SUP001 | painting | oil painting of Abergynolwyn Winding House |  |
| TYWRM:SUP002 | lamp | oil lamp previously displayed with TR041 |  |
| TYWRM:SUP003.1 | pattern | wooden pattern for Giesl Ejector |  |
| TYWRM:SUP003.2 | pattern | wooden pattern for Giesl Ejector chimney | |
| TYWRM:SUP004 | signal disc | spare disc for Festiniog Railway signal |  |
| TYWRM:SUP005 | signal crank | signal cable crank; Great Western Railway |  |
| TYWRM:SUP006 | brackets | three wrought iron lamp brackets |  |
| TYWRM:SUP007 | frame | wrought iron hanging lamp frame |  |
| TYWRM:SUP008 | bracket | cast iron bench (?) bracket with monogram "CLC" or "LCC" |  |
| TYWRM:SUP009 | firebars | four locomotive firebars |  |