| Diplomatic transcription of the title page | Dédié | à | Margrit Weber. | Concerto in B. | pour piano. | Bohuslav Martinu. | Pratteln – Suisse. | January 3. 1958. | (Durée 23 min.). |
| Number of leaves | 41 + 2 listy předsádky / 2 flyleaves |
| Number of pages bearing notation | 80 + titulní strana / title page |
| Original pagination | 1–80 |
| Dimensions (width x height) | 304 x 428 mm |
| Binding | Hardcover |
| Paper characteristics | Yellowed |
| Number and arrangement of staves | 26 |
| Distance between staff lines | 1,5 mm |
| Diplomatic transcription of performing forces - 1st page of the score | Pic. | Fl 1. 2. | Ob 1. 2. | Cl. in Bb 1. 2. | Fag. 1. 2. | Horns 1. 2. | 3 4 | Trp. in C. 1. 2. | Trb. 1. 2. | 3 | Timp. | Piano | I. | II. | V. | Vc. | CB |
| Markings by B. Martinů | Lead pencil |
| Other markings | Red pencil (p. 2, unidentified hand). |
| Comments | Date and place of origin of the first movement is missing on page 34 (see 366/A – it was apparently inscribed in the autograph only after creation of 366/RA1). |