The face value of the debentures is ₹100 each. When issuing 6,000 debentures, the 8% Debentures Account is credited with the total face value. The discount on issue (₹4 per debenture) is recorded separately as a loss.
Calculation:
\[
\text{Total face value} = 6,000 \times ₹100 = ₹6,00,000.
\]