Full Judgment
2. We have heard both sides. We note that the contract between the appellant and the Ordnance Factory at Kanpur included a price variation clause on account of customs duty and foreign exchange rate variation, that the DCS & D allowed price escalation vide its letter, dated 25-5-1993. Duty was paid on account of price escalation on 22-4-1993 and the respondents are seeking refund of part of the amount paid on 22-4-1993. We agree with the respondents that the relevant date for refund is the date of payment of duty vide supplementary invoice and since the refund claim has been filed within a period of six months from such date, it is not barred by limitation.
3. In the result we hold that the refund claim is admissible subject to the bar of unjust enrichment contained in Section 11B of the Central Excise Act, 1944.