pixels, file size: 1.43 MB, MIME type: image/jpeg) Description English: Preserved First Glasgow bus 31213 (reg. A735 PSU), a 1973 Volvo Ailsa B55 double-decker with Alexander RV bodywork, pictured at the 2009 Glasgow Vintage Vehicle Trust open day . It was new to Strathclyde PTE as their fleet no. A109. Strathcylde