The above pay scale is as follows:
Initial Salary and Increment Structure
The salary of the clerk at the beginning is Rs. 325. There is an increment of Rs. 20 every year for five years or until his salary reaches Rs. 425.
Subsequent Increment Stages
After that, the rate of increment is Rs. 25 every year for the next five years or until his salary reaches Rs. 550. Following that, the rate of increment is Rs. 30 every year for the subsequent five years or until his salary reaches Rs. 700.
Subsequently, the increment rate is Rs. 35 every year for the following six years or until his salary reaches Rs. 910. Then, the increment rate is Rs. 40 for the next six years or until his salary reaches Rs. 1150, Rs. 45 for the subsequent five years or until Rs. 1375, and Rs. 50 for the following five years or until Rs. 1625.
Final Salary and Tenure
His final salary would be Rs. 1625, with no further increases. This pay scale is applicable for a maximum tenure of 37 years.
Performance-Based Increments
There is no restriction on receiving more than a single increment based on performance/efficiency. In such cases, the tenure of the scale will be shorter, and there will be stagnation at Rs. 1625 unless there is a revision.
This type of pay scale pattern is now considered outdated in the private sector. There is also a concept of EB in between, where EB stands for the efficiency bar.
I hope I have explained this clearly.