Yayiyisiphi isigaba sesitimela uNo. 13?
Context:Uhlobo lwe-OA luyi-locomotive yensimbi eyodwa eyakhiwe yiBaldwin Locomotive Works ye-Wellington ne-Manawatu Railway (WMR) eNew Zealand. Eyalwe ngo-1894, yaqala ukusebenza ngo-August walowo nyaka njengenombolo 13 futhi yayiyi-compound yokuqala ye-Vauclain enomkhondo omncane emhlabeni. Ngo-1908, i-WMR kanye ne-locomotive yayo yathengwa nguMnyango Wezitimela waseNew Zealand (i-NZR) futhi yahlanganiswa nenethiwekhi kazwelonke yezitimela, futhi, yize iNombolo 13 yayifana namalungu ekilasi le-O, yayihluke ngokwanele ukuthi ifanele ukuhlukaniswa okuhlukile. Kwaqanjwa igama elithi OA futhi laqanjwa inombolo ethi OA 457. Yasebenza eminye iminyaka engamashumi amabili kwaze kwaba yilapho ikhishwa ngo-December 1929 e-Auckland. Abasebenzi be-WMR babeyibiza ngokuthi "iNkosikazi".
Isitimela esinguNombolo 13 sasiyisigaba se-OA.