West Penn Today - Greensburg and Latrobe

[Donald Galt]

On 1 Aug 00, at 18:28, HRBran99 at aol.com wrote:

> The PRCo publication "Pittsburgh by Trolley and Bus" dated
> June, 1937 lists the following for Rt. 200-Mt. Washington
> Bus:........

My 193_ street map mentioned earlier shows bus O - Oh, not 
Naught    ;-)   - the "Mt. Washington streetcar connecting bus" 
running exactly the route of the streetcar.

Can anybody tell me when PRCo bus routes received numbers? 
This map gives them letter designations, A-O, which could be 
either official or nothing more than the map's own identifiers. 
Answering this question could help me date the map.

Thanks,

Don