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TOPS Code/Class:	AC21		Previous	Next
TOPS Category: ?This is my own (unofficial) means to categorise TOPS codes based on what they relate to and whether they are long (4 characters, i.e. including sub-codes) or short (3 characters)	LC - Long Code, Coaching Stock	In selection ?This works on your last-used TOPS selection, including any filters and sort orders. Buttons will not show if the current TOPS code was not in your last selection, or if you are at the beginning or end of the data set.
TOPS GENKOC: ?The first character of a TOPS code is known as the GENKOC and indicates the general type of rolling stock (e.g. 1xx are DMUs).	A - Passenger-carrying coaches	Overall ?This works on the overall TOPS code list without any filtering or sorting applied.
TOPS BRAKTY: ?The third character of many TOPS codes is the BRAKTY, indicating the type of braking equipment fitted (e.g. A indicates air brakes).	* - Not defined by code
Parent:	AC? (Gangwayed Open Coach (2+2 seating))
Description:	Mk.1 TSO (Open Second)
Numbers: ?Numbers are only shown where the ranges were limited. Otherwise, refer to the listings section below. The letter r after the numbers indicates this is a range, with not all numbers in the sequence used.
Status:
Date On:
Origins:
Date Off:
Destiny:
Key Photo:
Icon:

Sub-codes ?If this code had any sub-codes, they will be listed here.
None found

Designs/Diagrams ?Design codes and diagrams related to this code (and any sub-codes where relevant) are listed here.
17 designs/diagrams currently listed against this TOPS code/class (including any sub-codes).

Design	Class	Series	Description	Status
AC201		BR TOPS Carriage Diagram	Mk.1 Tourist Second Open (TSO)	TBC
AC204		BR TOPS Carriage Diagram	Mk.1 Tourist Second Open (TSO)	TBC
AC201.1A		BR TOPS Carriage Design Code	Mk.1 Tourist Second Open (TSO)	TBC
AC201.1D		BR TOPS Carriage Design Code		TBC
AC201.1E		BR TOPS Carriage Design Code	Mk.1 Tourist Second Open (TSO)	TBC
AC201.1F		BR TOPS Carriage Design Code	Mk.1 Tourist Second Open (TSO)	TBC
AC201.1H		BR TOPS Carriage Design Code		TBC
AC201.1S		BR TOPS Carriage Design Code	Mk.1 Tourist Second Open (TSO)	TBC
AC201.1T		BR TOPS Carriage Design Code	Mk.1 Tourist Second Open (TSO)	TBC
AC201.1X		BR TOPS Carriage Design Code		TBC
AC201.1Y		BR TOPS Carriage Design Code		TBC
AC201.2A		BR TOPS Carriage Design Code	Mk.1 Tourist Second Open (TSO)	TBC
AC201.2S		BR TOPS Carriage Design Code		TBC
AC201.2U		BR TOPS Carriage Design Code		TBC
AC201.2V		BR TOPS Carriage Design Code		TBC
AC201.2W		BR TOPS Carriage Design Code		TBC
AC204.0G		BR TOPS Carriage Design Code		TBC

Batches ?Batches of numbers built or converted to this TOPS code are listed below. Note that only codes that were wholly to this code will appear, otherwise refer to the listings section for other numbers.
There are 30 batches recorded as being wholly to this TOPS code (including any sub-codes).

Numbers	Class	Design	Type	Qty	Origin	Built/Converted	Date/s	Lot
3700-3705	AC21	92	Mk.1 Tourist Open Second (TSO)	6	New	BR, York	1951	30011
3706-3720	AC21	92	Mk.1 Tourist Open Second (TSO)	15	New	Cravens	1952	30017
3736-3753	AC21	93	Mk.1 Tourist Open Second (TSO)	18	New	BR, Doncaster	1953	30043
3754-3772	AC21	93	Mk.1 Tourist Open Second (TSO)	19	New	BR, York	1953	30079
3773-3788	AC21	93	Mk.1 Tourist Open Second (TSO)	16	New	BR, Doncaster	1953	30043
3789-3823	AC21	93	Mk.1 Tourist Open Second (TSO)	35	New	BR, York	1953	30079
3824-3849	AC21	93	Mk.1 Tourist Open Second (TSO)	26	New	BR, Ashford/Eastleigh	1953-1954	30054
3850-3885	AC21	93	Mk.1 Tourist Open Second (TSO)	36	New	BR, York	1953-1954	30080
3886-3903	AC21	93	Mk.1 Tourist Open Second (TSO)	18	New	BR, Ashford/Eastleigh	1954	30054
3904-3913	AC21	93	Mk.1 Tourist Open Second (TSO)	10	New	BR, Eastleigh	1954-1955	30086
3914-3924	AC21	93	Mk.1 Tourist Open Second (TSO)	11	New	BR, Ashford/Eastleigh	1954-1955	30086
3925-3969	AC21	93	Mk.1 Tourist Open Second (TSO)	45	New	BR, Eastleigh	1954-1955	30086
3970-3997	AC21	93	Mk.1 Tourist Open Second (TSO)	28	New	BR, York	1954	30090
3998-4097	AC21	93	Mk.1 Tourist Open Second (TSO)	100	New	BR, Ashford/Eastleigh	1956-1957	30149
4098-4197	AC21	93	Mk.1 Tourist Open Second (TSO)	100	New	BR, York	1955-1956	30171
4198-4257	AC21	93	Mk.1 Tourist Open Second (TSO)	60	New	BR, York	1956	30172
4258-4357	AC21	93	Mk.1 Tourist Open Second (TSO)	100	New	Birmingham RC&W	1956	30207
4373-4412	AC21	93	Mk.1 Tourist Open Second (TSO)	40	New	BR, Ashford/Eastleigh	1957	30219
4413-4472	AC21	93	Mk.1 Tourist Open Second (TSO)	60	New	Birmingham RC&W	1956-1957	30226
4488-4636	AC21	93	Mk.1 Tourist Open Second (TSO)	149	New	BR, York	1956-1957	30243
4638	AC21	95	Prototype Tourist Open Second (TSO)	1	New	Cravens	1957	30362
4639-4726	AC21	93	Mk.1 Tourist Open Second (TSO)	88	New	BR, York	1957	30375
4739-4778	AC21	93	Mk.1 Tourist Open Second (TSO)	40	New	BR, York	1957	30375
4830-4839	AC21	89	Mk.1 Tourist Open Second (TSO)	10	New	BR, Wolverton	1959	30506
4840-4899	AC21	89	Mk.1 Tourist Open Second (TSO)	60	New	BR, Wolverton	1959-1960	30525
4900-4917	AC21	89	Mk.1 Tourist Open Second (TSO)	18	New	BR, Wolverton	1961	30646
4918-4966	AC21	89	Mk.1 Tourist Open Second (TSO)	49	New	BR, Wolverton	1961-1962	30690
4973-5010	AC21	89	Mk.1 Tourist Open Second (TSO)	38	New	BR, Wolverton	1961-1962	30690
5023-5044	AC21	89	Mk.1 Tourist Open Second (TSO)	22	New	BR, Wolverton	1961-1962	30690
5045-5069	AC21	89	Mk.1 Tourist Open Second (TSO)	25	New	BR, York	1963	30724

Profiles ?Profiles provide an overview of the histories of various types of train. Profiles that are relevant to this TOPS class/code are listed below. If no profiles are shown, try looking under the parent code (in main details section above)

Photos - Internal
There are 8 photos of this type (including any sub-codes).

Photos - External
No external photos of this item yet.

Listings
There are 288 listings (with 206 distinct numbers) for this TOPS code/class (including any sub-codes).

Notes
No notes have been left yet. ?There may be some notes posted but which have not yet been approved.

Related Information
To be added

Dimensions ?Dimensions are normally recorded against design/diagram numbers. They can be recorded against batches, lots or TOPS codes if the design/diagram is not available.
There are no dimensions recorded for this TOPS code.

Drawings ?Drawings are normally referenced to specific design/diagram numbers. They can be recorded against batches, lots or TOPS codes if the design/diagram is not available. If no drawings are listed here, try looking at related designs/diagrams (above).
There are no drawings referenced for this TOPS code.

Data History
Record added 01/01/2020 by Thomas Young

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Record edited 1 time.

Time / Date	Edited by	Change
14:38 on Sun 05/09/2021	Thomas Young	Key photo added